Move resources from gerrit-gwtui to gerrit-gwtui-common

This allows plugins to use the standard Gerrit icons.

There is now a single place were icons are stored (in
com.google.gerrit.client in gerrit-gwtui-common). Before they were
distributed over different packages. An exception are a few icons in
com.google.gerrit.client.admin and com.google.gerrit.client.diff which
cannot be moved since they are referenced from a css file in the same
package (at least I don't know how to link to the icons in
gerrit-gwtui-common from the css files).

The icon names were made consistent, duplicate icons were deleted and
the icons are also moved from src/main/java/ to src/main/resources/.

In addition the only gif icon was converted to png.

Change-Id: Ibd9475ae175de6acc7c36bf2e40f96b003f2af10

gerrit-gwtui/src/main/java/com/google/gerrit/client/admin/AdminResources.java

@@ -24,9 +24,6 @@ public interface AdminResources extends ClientBundle {
   @Source("admin.css")
   AdminCss css();
 
-  @Source("editText.png")
-  public ImageResource editText();
-
   @Source("deleteNormal.png")
   public ImageResource deleteNormal();
 

gerrit-gwtui/src/main/java/com/google/gerrit/client/admin/ValueEditor.ui.xml

@@ -18,7 +18,7 @@ limitations under the License.
   xmlns:ui='urn:ui:com.google.gwt.uibinder'
   xmlns:g='urn:import:com.google.gwt.user.client.ui'
   >
-<ui:with field='res' type='com.google.gerrit.client.admin.AdminResources'/>
+<ui:with field='ico' type='com.google.gerrit.client.GerritResources'/>
 <ui:style>
   .panel {
     position: relative;
@@ -49,7 +49,7 @@ limitations under the License.
 <g:HTMLPanel stylePrimaryName='{style.panel}'>
   <g:Image
       ui:field='editIcon'
-      resource='{res.editText}'
+      resource='{ico.edit}'
       stylePrimaryName='{style.editIcon}'
       title='Edit'>
     <ui:attribute name='title'/>