Qt port: fix controller document, fix keyboard modState, fix key event redirection, fix last tab close bug, fix menu emulated shortcuts, add pakal to build

- add an stitchPostProcess method in OE_stitchs to handle every post modifiers (maxLen, stretch,...)

- cleanup unused code in OE_interfaceDisplay::mouse_Pos method

- change the way to make linestitch and birailstitch (trace only one segment by default, remove validation with "return" key)

- uniformise color of every interactive controls of the curves and stitch

  OE_actionScaleSelectedStitchLen
  OE_actionScaleSelectedStitchWidth
  OE_actionSetSelectedStitchPattern
- fix memory leaks when deleting meta actions:
  OE_actionScaleSelectedBirailStitchLen
  OE_actionScaleSelectedLineStitchWidth
  OE_actionScaleSelectedLineStitchLen
  OE_actionSetSelectedLineStitchPattern
  OE_actionSelectionClear

- fix a bug in OE_fillstitch due to error in detection of intersections between some stitch patterns and patch contours

- fix multi cut bug in cutStitches (bad detection of a stitch cut more than once by the contour)