2 weeks ago the properties EndTypeScale and LineVisible were added but not to the dialog.
This PR adds them t the balloon dialog-
It also took the opportunity to cleanup the code:
- add missing tooltips
- uniform tooltips in App and Gui
- uniform the UI element names
- remove the unused property OriginIsSet
- refurbish TaskDialog and add new settings:
- use SpinBox for Shape Scale
- add Font Size
- add Text Color
- add Line Width
- add Kink Length
- correct and add tooltips
- in the prefs we call the outline "shape" and this describes it better than "symbol" (it is the shape of the bubble). The line end, however, has a symbol so "Shape" makes clear that is is something different.
