fix editor linking, single select, state restore and drill-down controls

rework TreeNodeFactory into ContentProvider, LabelProvider, ViewerFilter

#1186 #1187

Author: eric-milles

checkstyleConfig.xml

@@ -744,7 +744,7 @@
     </module>
     <module name="RegexpSingleline">
         <property name="message" value="Single quotation marks should be used for simple string literals" /><!-- ^(?:\s{4})*+(?!//|[/\s]\*|\|) tries to exclude comments or multi-line string continuation -->
-        <property name="format" value="^(?:\s{4})*+(?!//|[/\s]\*|\|)(?:&apos;[^&apos;]*&apos;|&quot;[^&quot;]*\$[^&quot;]*&quot;|[^&quot;])*+(&quot;{2}(?!&quot;)|&quot;(?:\\&quot;|[^\$&quot;])+&quot;(?!\s*:)|(?&lt;=\bcase\s{1,9})&quot;(?:\\&quot;|[^\$&quot;])+&quot;)" />
+        <property name="format" value="^(?:\s{4})*+(?!//|[/\s]\*|\|)(?:&apos;[^&apos;]*&apos;|&quot;[^&quot;]*\$[^&quot;]*&quot;|[^&quot;])*+((?&lt;!\\)&quot;{2}(?!&quot;)|&quot;(?:\\&quot;|[^\$&quot;])+&quot;(?!\s*:)|(?&lt;=\bcase\s{1,9})&quot;(?:\\&quot;|[^\$&quot;])+&quot;)" />
         <property name="fileExtensions" value="groovy" />
         <property name="id" value="groovyStringLiterals" />
     </module>

ide/org.codehaus.groovy.eclipse.astviews/plugin.xml

@@ -11,7 +11,11 @@
             class="org.codehaus.groovy.eclipse.astviews.ASTView"
             icon="platform:/plugin/org.codehaus.groovy.eclipse/$nl$/groovy16.png"
             id="org.codehaus.groovy.eclipse.astviews.ASTView"
-            name="Groovy AST Viewer">
+            name="Groovy AST Viewer"
+            restorable="false">
+         <description>
+            Inspect the Abstract Syntax Tree (AST) of a Groovy source
+         </description>
       </view>
    </extension>
 </plugin>