chore(common): fix namespaces in snippets

Author: marin-bratanov

components/button/overview.md

@@ -35,15 +35,10 @@ To add a Telerik Button to your Blazor app, use the `<TelerikButton>` tag:
 ````CSHTML
 @using Telerik.Blazor.Components.Button
 
-<TelerikButton ref="@theButton" OnClick="@MyClick">Hello!</TelerikButton>
+<TelerikButton ref="@theButton">Hello!</TelerikButton>
 
 @functions{
 	Telerik.Blazor.Components.Button.TelerikButton theButton;
-
-	void MyClick()
-	{
-		Console.WriteLine(theButton);
-	}
 }
 ````
 

components/calendar/navigation.md

@@ -22,11 +22,12 @@ You can control how far the user can go by setting the `Min` and `Max` propertie
 
 ````CSHTML
 @using Telerik.Blazor.Components.Calendar
+@using Telerik.Blazor
 
 The user starts in April 2019 and can navigate between January 2019 and July 2019.
 <br />
 
-<TelerikCalendar Date="@startDate" View="CalendarView.Month" Min="@minDate" Max="@maxDate"></TelerikCalendar>
+<TelerikCalendar Date="@startDate" View="@CalendarView.Month" Min="@minDate" Max="@maxDate"></TelerikCalendar>
 @functions {
 	DateTime startDate = new DateTime(2019, 4, 1);
 	DateTime minDate = new DateTime(2019, 1, 1);
@@ -57,11 +58,12 @@ You can control how much detail the user can go into by setting the `BottomView`
 
 ````CSHTML
 @using Telerik.Blazor.Components.Calendar
+@using Telerik.Blazor
 
 The user starts in the Decade view and can only go down to years.
 <br />
 
-<TelerikCalendar BottomView="@CalendarView.Year" View="CalendarView.Decade" 
+<TelerikCalendar BottomView="@CalendarView.Year" View="@CalendarView.Decade" 
                 Min="@min" Max="@max" ValueChanged="@MyValueChangeHandler">
 </TelerikCalendar>
 

components/calendar/selection.md

@@ -39,6 +39,7 @@ To prevent the user from selecting certain dates (for example, holidays), add th
 
 ````CSHTML
 @using Telerik.Blazor.Components.Calendar
+@using Telerik.Blazor
 
 The user will not be able to select the first and second of April 2019.
 

components/window/actions.md

@@ -63,7 +63,7 @@ You can create a custom action icon and you must provide its `OnClick` handler.
 
 <TelerikWindow Visible="true">
 	<TelerikWindowActions>
-		<TelerikWindowAction Name="MyAction" Icon="gear" OnClick="@MyCustomActionHandler"></TelerikWindowAction>
+		<TelerikWindowAction Name="MyAction" Icon="@Telerik.Blazor.IconName.Gear" OnClick="@MyCustomActionHandler"></TelerikWindowAction>
 	</TelerikWindowActions>
 	<TelerikWindowContent>
 		@result
@@ -97,7 +97,7 @@ You can mix custom actions with built-in actions, and you do not have to define
 <TelerikWindow Visible="true">
 	<TelerikWindowActions>
 		<TelerikWindowAction Name="Minimize"></TelerikWindowAction>
-		<TelerikWindowAction Name="MyAction" Icon="info" OnClick="@MyCustomActionHandler"></TelerikWindowAction>
+		<TelerikWindowAction Name="MyAction" Icon="@Telerik.Blazor.IconName.Information" OnClick="@MyCustomActionHandler"></TelerikWindowAction>
 		<TelerikWindowAction Name="Maximize"></TelerikWindowAction>
 	</TelerikWindowActions>
 	<TelerikWindowContent>