Added Filter search for WFS layers. Also improved the treeView to have better column and row layout
Changed back to ExtendedSelection mode for the WFS item view
Add option for using WFS type name title for the added layer name
Remove unused variables
Merge pull request #494 from palmerj/wfs_ui_improvements

WFS Layer Selection UI Improvements
[FEATURE] Add background symbols to labels

- Rectangle, square, circle and ellipse generated symbols
- SVG background from new symbology
SVG working and scaling correctly; outline width param needs updated in cache rendering
Revert start at fixing SVG outline-width param in map units (broken)
Allow direct update of QgsColorButton background
Update labeling gui to manually choose SVG file
Add svg selector widget and update gui