Graal v4 Bugs - For Stefan/testers

[CheeToS2]

New additions in .31:
- Multiline text control scrolling added

- Added several new stuff to GuiScrollControl

- You can set scrolllinex and scrollliney for controls now
(specifies how much the scroll control is scrolled when you click on the arrows, you need to set it in the subcontrol)

- There is also a showtop() function which is a combination of show(), bringtofront(), and tabfirst()
(tabfirst() is focussing the first edit control)

- Added ctrl.globaltolocalcoord({x,y}) and ctrl.localtoglobalcoord({x,y})
(Converts coordinates for gui controls from screenx/y to x/y in terms of the guictrl)

- showpolys can be used inside controls now with GuiShowImgCtrl