Issue #112: Prevent overlapping of widget editor labels.
Remove unused imports.
Merge branch '#112/fix-overlap-of-widget-editor-labels' into develop
Issue #113: Ensure layer list item labels do not extend beyond exclude layer list.
Clean up.
Merge branch '#113/improve-layout-of-exclude-layer-list-items' into develop
Issue #111: Improve title container's label.

* Enable wrapping.

* Truncate after 2 lines.
Apply formatting.
Prevent operational layer list from overlapping border when resized to minimum dimensions.
Merge branch '#111/tweak-title-container-label' into develop