[gimp] (25 commits) ...app, po: remove GimpControllerMouse code.

[Jehan <jehanp src gnome org>]

Summary of changes:

  43f0147... app: allow to change the brush size on alt-right click. (*)
  b112477... app: stop alt-right click brush size change when releasing  (*)
  5be997f... app: display the brush outline (or fallback or circle) when (*)
  8e9abd5... app: make sure the size circle is also displayed for the in (*)
  59709d3... app: distance moved on-canvas set the ink tool size as well (*)
  12be7bd... app: adding GimpDoubleAction types of actions. (*)
  c7979e7... app: new double action "tools-mypaint-brush-pixel-size-set" (*)
  ebf9913... app: create a new pixel-size-set action for Ink and Brush t (*)
  67d5e59... app: new "tools-warp-effect-pixel-size-set" pixel size set  (*)
  c804865... app: new "tools-paint-select-pixel-size-set" action. (*)
  a853052... app: new "Canvas Interaction" setting. (*)
  fe65b4d... app: new GimpShortcutButton widget. (*)
  924dea3... app, po: show proper instructions in GimpShortcutButton. (*)
  91b3014... app: add a GimpModifiersManager object to GimpDisplayConfig (*)
  9d3ef44... app: use modifiers set in GimpModifiersManager rather than  (*)
  100bded... app: store keys as keyval/modifiers rather than string. (*)
  5167e5a... app: new GimpModifiersEditor widget. (*)
  89f5533... app: add a page in Preferences to set the canvas modifiers  (*)
  1ab4661... app: fix space actions on canvas. (*)
  156adee... app: new modifier action to set brush size diameter. (*)
  23dd00b... app: fix switching seamlessly from constrained to unconstra (*)
  14e8703... app: remove GIMP_MODIFIER_ACTION_BRUSH_SIZE, change default (*)
  f7d7771... app: try to make the button selection button more obvious. (*)
  dd012d1... app: now support custom actions as input device button + mo (*)
  76ddf44... app, po: remove GimpControllerMouse code. (*)

(*) This commit already existed in another branch; no separate mail sent