Switching between Shape Mode by click, experimental

instead of doubleClick.
to see if it is a good idea
Back to double Click

also re-added disabling shape mode when clicking outside the polygon

Added transparent polygon in PolygonEditorView
Minor changes
Feature: SelectionRectangle
SelectionRectangle bugfix
Pull Upstream, new helpfile
Added Cursor Enum Creation in BoundsResize
Changed snapping logic

It's now based on Vertex Dragging, not on Mousedown, which makes more
sence
Minor changes
Added Snap Threshold Pin
Fixed Quantization Pin
Minor Changes
Edited default Snap Threshold to 0.06
Fixed Selection Rect bug
Patch Aesthetic changes in TagVertices & SelectionRectangle
Sort After Z-Index -> Sort By Z-Index
Pin Renaming
Fixed Quantization bug, added Author Tag (+ fixed remaining pinnaming issue)
Merge pull request #212 from DominikKoller/PolygonEditor

Polygon editor