docs(common): add tips for async input events

Author: marin-bratanov

components/dateinput/events.md

@@ -43,6 +43,8 @@ The date input is a generic component, so you must provide either a `Value`, or
 }
 ````
 
+@[template](/_contentTemplates/common/general-info.md#event-callback-can-be-async)
+
 >tip The `OnChange` event is a custom event and does not interfere with bindings, so you can use it together with models and forms.
 
 >caption Handle OnChange and use two-way binding
@@ -95,6 +97,8 @@ The `ValueChanged` event fires upon every change (for example, keystroke) in the
 }
 ````
 
+@[template](/_contentTemplates/common/general-info.md#event-callback-can-be-async)
+
 @[template](/_contentTemplates/common/issues-and-warnings.md#valuechanged-lambda-required)
 
 >caption Handle ValueChanged and provide initial value

components/datepicker/events.md

@@ -43,6 +43,8 @@ The date picker is a generic component, so you must provide either a `Value`, or
 }
 ````
 
+@[template](/_contentTemplates/common/general-info.md#event-callback-can-be-async)
+
 >tip The `OnChange` event is a custom event and does not interfere with bindings, so you can use it together with models and forms.
 
 >caption Handle OnChange and use two-way binding
@@ -95,6 +97,8 @@ The `ValueChanged` event fires upon every change (for example, keystroke) in the
 }
 ````
 
+@[template](/_contentTemplates/common/general-info.md#event-callback-can-be-async)
+
 @[template](/_contentTemplates/common/issues-and-warnings.md#valuechanged-lambda-required)
 
 >caption Handle ValueChanged and provide initial value

components/numerictextbox/events.md

@@ -43,6 +43,8 @@ The numeric textbox is a generic component, so you must provide either a `Value`
 }
 ````
 
+@[template](/_contentTemplates/common/general-info.md#event-callback-can-be-async)
+
 >tip The `OnChange` event is a custom event and does not interfere with bindings, so you can use it together with models and forms.
 
 >caption Handle OnChange and use two-way binding
@@ -95,6 +97,8 @@ The `ValueChanged` event fires upon every change (for example, keystroke) in the
 }
 ````
 
+@[template](/_contentTemplates/common/general-info.md#event-callback-can-be-async)
+
 @[template](/_contentTemplates/common/issues-and-warnings.md#valuechanged-lambda-required)
 
 >caption Handle ValueChanged and provide initial value

components/textbox/events.md

@@ -40,6 +40,8 @@ The `OnChange` event fires when the new value is commited by the user either by
 }
 ````
 
+@[template](/_contentTemplates/common/general-info.md#event-callback-can-be-async)
+
 >tip The `OnChange` event is a custom event and does not interfere with bindings, so you can use it together with models and forms.
 
 >caption Handle OnChange and use two-way binding
@@ -91,6 +93,8 @@ The `ValueChanged` event fires upon every change (for example, keystroke) in the
 }
 ````
 
+@[template](/_contentTemplates/common/general-info.md#event-callback-can-be-async)
+
 @[template](/_contentTemplates/common/issues-and-warnings.md#valuechanged-lambda-required)
 
 >caption Handle ValueChanged and provide initial value