Refactor Context Menus and make them use XAML & stylesheets (#4768)

* XAML verb menu

* fix ghost FOV

* spacing

* rename missed "ContextMenu"->"EntityMenu" instances

* move visibility checks to verb system

* update comment

* Remove CanSeeContainerCheck

* use ScrollContainer measure option

* MaxWidth / texxt line wrapping

* verb category default

Now when you click on a verb category, it should default to running the first member of that category.

This makes it much more convenient to eject/insert when there is only a single option

* only apply style to first verb category entry

* Use new visibility flags

* FoV -> Fov

* Revert "only apply style to first verb category entry"

This reverts commit 9a6a17dba600e3ae0421caed59fcab145c260c99.

* make all entity menu visibility checks clientside

* Fix empty unbuckle category

* fix merge

Content.Client/ContextMenu/UI/ContextMenuElement.xaml

@@ -0,0 +1,26 @@
+<ContainerButton
+    xmlns="https://spacestation14.io"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:ui="clr-namespace:Content.Client.ContextMenu.UI"
+    MinHeight="{x:Static ui:ContextMenuElement.ElementHeight}">
+    <BoxContainer Orientation="Horizontal">
+        <Control
+            Name="Icon"
+            SetWidth="{x:Static ui:ContextMenuElement.ElementHeight}"
+            SetHeight="{x:Static ui:ContextMenuElement.ElementHeight}"/>
+        <RichTextLabel
+            Name="Label"
+            MaxWidth="300"
+            HorizontalExpand="True" 
+            VerticalAlignment="Center"
+            Margin ="4 0 4 0"/>
+        <TextureRect
+            Name="ExpansionIndicator"
+            HorizontalAlignment="Right"
+            Stretch="KeepCentered"
+            TextureScale="0.5 0.5"
+            SetWidth="{x:Static ui:ContextMenuElement.ElementHeight}"
+            SetHeight="{x:Static ui:ContextMenuElement.ElementHeight}"
+            Visible ="false"/>
+    </BoxContainer>
+</ContainerButton>