docs(selects): document LoaderShowDelay parameter (#1882)

Author: ntacheva

components/autocomplete/overview.md

@@ -87,6 +87,7 @@ The Blazor AutoComplete provides various parameters that allow you to configure
 | `Filterable` | `bool` | Whether [filtering]({%slug multiselect-filter%}) is enabled for the end user (suggestions will get narrowed down as they type). |
 | `FilterOperator` | `StringFilterOperator` <br /> (`StartsWith`) | The string operation that will be used for [filtering]({%slug multiselect-filter%}). |
 | `Id` | `string` | Renders as the `id` attribute on the `<input />` element, so you can attach a `<label for="">` to the input.|
+| `LoaderShowDelay` | `int ` <br /> 300 | Time in milliseconds between opening the popup and showing the loading skeleton in it when the data is not yet available. |
 | `TItem` | `Type`  | The type of the model to which the component is bound. Required if you can't provide `Data` or `Value`. Determines the type of the reference object. |
 | `Title` | `string` | The title text rendered in the header of the popup(action sheet). Applicable only when [`AdaptiveMode` is set to `Auto`]({%slug adaptive-rendering%}). |
 | `Value` and `bind-Value` | `string`  | Get/set the value of the component, can be used for binding. Use the `@bind-Value` syntax for two-way binding, for example, to a variable of your own. The `Value` must be a `string`.|

components/combobox/overview.md

@@ -91,6 +91,7 @@ The Blazor ComboBox @[template](/_contentTemplates/dropdowns/features.md#groupin
 |`Filterable` | `bool` | whether [filtering]({%slug components/combobox/filter%}) is enabled for the end user. |
 | `FilterOperator` | `StringFilterOperator` <br /> (`StartsWith`) | the method of [filtering]({%slug components/combobox/filter%}) the items. |
 | `Id` | `string` | renders as the `id` attribute on the `<input />` element, so you can attach a `<label for="">` to the input. |
+| `LoaderShowDelay` | `int ` <br /> 300 | Time in milliseconds between opening the popup and showing the loading skeleton in it when the data is not yet available. |
 | `Placeholder` | `string` | the text the user sees as a hint when no item is selected. In order for it to be shown, the `Value` parameter should be set to a default value depending on the type defined in the `ValueField` parameter. For example, `0` for an `int`, and `null` for an `int?` or `string`. You need to make sure that it does not match the value of an existing item in the data source. |
 | `TItem` | `Type` | the type of the model to which the component is bound. Required if you can't provide `Data` or `Value`. Determines the type of the reference object. |
 | `TValue` | `Type` | the type of the value field from the model to which the component is bound. Required if you can't provide `Data` or `Value`. Determines the type of the reference object. The type of the values can be:<br /> - `number` (such as `int`, `double`, and so on)<br /> - `string`<br /> - `Guid`<br /> - `Enum` |

components/multicolumncombobox/overview.md

@@ -124,6 +124,7 @@ The MultiColumnComboBox @[template](/_contentTemplates/dropdowns/features.md#gro
 | `Filterable` | `bool` | Enables [filtering]({% slug multicolumncombobox-filter %}) for the end user. |
 | `FilterOperator` | `StringFilterOperator` enum <br /> (`StartsWith`) | The [filtering method]({% slug multicolumncombobox-filter %}). |
 | `Id` | `string` | The `id` attribute of the `<input class="k-input-inner" />` element. Use it to attach a `<label for="...">` to the input. |
+| `LoaderShowDelay` | `int ` <br /> 300 | Time in milliseconds between opening the popup and showing the loading skeleton in it when the data is not yet available. |
 | `Placeholder` | `string` | The hint text the user sees when no item is selected. The placeholder will shown when the `Value` is set to the default value of the `ValueField` type. For example, `0` for `int`, and `null` for `int?` or `string`. |
 | `TItem` | `Type` | The type of the model. Required if you can't provide `Data` or `Value`. Determines the type of the reference object. |
 | `TValue` | `Type` | The type of the `ValueField` from the model. Required if you can't provide `Data` or `Value`. Determines the type of the reference object. The type of the values can be:<br /> - `number` (`int`, `double`, etc.)<br /> - `string`<br /> - `Guid`<br /> - `Enum` |

components/multiselect/overview.md

@@ -105,6 +105,7 @@ The Blazor MultiSelect provides various parameters that allow you to configure t
 | `Filterable` | `bool` | Whether [filtering]({%slug multiselect-filter%}) is enabled for the end user (suggestions will get narrowed down as they type). |
 | `FilterOperator` | `StringFilterOperator` <br /> (`StartsWith`) | The string operation that will be used for [filtering]({%slug multiselect-filter%}). |
 | `Id` | `string` | Renders as the `id` attribute on the `<select />` element, so you can attach a `<label for="">` to it. |
+| `LoaderShowDelay` | `int ` <br /> 300 | Time in milliseconds between opening the popup and showing the loading skeleton in it when the data is not yet available. |
 | `MinLength` | `int` | How many characters the text has to be before the suggestions list appears. Cannot be `0`. Often works together with [filtering]({%slug multiselect-filter%}). |
 | `Placeholder` | `string` | The text the user sees as a hint when there is no selection. |
 | `TextField` | `string` <br /> (`Text`)| The field in the model from which the text of the items is taken. |