Update resource strings

Author: IvenBach

Rubberduck.Resources/UnitTesting/TestExplorer.Designer.cs

@@ -352,10 +352,10 @@
     <value>Unignore test</value>
   </data>
   <data name="TestExplorer_ContextMenuIgnoreGroup" xml:space="preserve">
-    <value>Ignore group tests</value>
+    <value>Ignore all tests in group</value>
   </data>
   <data name="TestExplorer_ContextMenuUnignoreGroup" xml:space="preserve">
-    <value>Unignore group tests</value>
+    <value>Unignore all tests in group</value>
   </data>
   <data name="TestExplorer_ContextMenuUnignoreSelectedTests" xml:space="preserve">
     <value>Unignore selected tests</value>