add drag'n'drop stitch reorder within OE_ui_stitchlist

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

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

- store the len value of the birailStitch
- add the move function to staticStitch
- add getStitchStart and getStitchEnd method to OE_linkstitch
- fix a bug in OE_linkstitch::refresh method (it always put needRefresh to false)
- add double point motif to OE_linestitch
- add OE_actionDelStitch
- fix a bug in refreshDependency of most stitches and curves (does not refresh dependency of their own dependency)

- create an actionSelection only when there is a selection

- improve selection mode to create only one action for each clic
- fix problem on delete of some stiches