Update vector layer properties dialog with vertical tabs

- Following subsections still need work: Labeling (ng), Diagrams and possibly more on Style
- Add new SVG icons for Labels, Display and Metadata tabs
- Add up/down, plus/minus icons for consistency
- Move Metadata tab to bottom of list for vector and raster layer property dialogs
- Update report stylesheet (metadata output) to support direct RTF copy/paste (i.e. black-colored fonts)
- Update report stylesheet to use light gray backgrounds for headers instead of unpredictable highlight color

images/images.qrc

@@ -374,14 +374,17 @@
         <file>themes/default/propertyicons/CRS.png</file>
         <file>themes/default/propertyicons/diagram.png</file>
         <file>themes/default/propertyicons/digitising.png</file>
+        <file>themes/default/propertyicons/display.svg</file>
         <file>themes/default/propertyicons/gdal.png</file>
         <file>themes/default/propertyicons/general.png</file>
         <file>themes/default/propertyicons/histogram.png</file>
         <file>themes/default/propertyicons/join.png</file>
         <file>themes/default/propertyicons/labels.png</file>
+        <file>themes/default/propertyicons/labels.svg</file>
         <file>themes/default/propertyicons/locale.png</file>
         <file>themes/default/propertyicons/map_tools.png</file>
         <file>themes/default/propertyicons/metadata.png</file>
+        <file>themes/default/propertyicons/metadata.svg</file>
         <file>themes/default/propertyicons/network_and_proxy.png</file>
         <file>themes/default/propertyicons/overlay.png</file>
         <file>themes/default/propertyicons/pyramids.png</file>