Map Editor beautification

- show full name + version of the loaded mod in titlebar
- added a help menu with useful links
- added icons to to the menu with tooltips
- added a toolbar to the editor, closes #2825

OpenRA.Editor/OpenRA.Editor.csproj

@@ -119,6 +119,7 @@
     <Compile Include="Properties\AssemblyInfo.cs" />
     <EmbeddedResource Include="ActorPropertiesDialog.resx">
       <DependentUpon>ActorPropertiesDialog.cs</DependentUpon>
+      <SubType>Designer</SubType>
     </EmbeddedResource>
     <EmbeddedResource Include="Form1.resx">
       <DependentUpon>Form1.cs</DependentUpon>