VideoProvider: fixed fullscreen playback on OSX
Engine: correctly hook up postRun to the Video function
UI: fixed SpeedDial layout creation code
ScriptEditor: added syntax check button
UI: fixed time editing of milliseconds (.3 is 300ms and not 30ms)
Updated translations (UI)
Script: unified values and times into a single function.

With this, it is possible to randomize also times
ScriptEditor: hooked up function stopped signal
Fixed Script Editor documentation
Update Spanish Translation
Getting ready to release 4.8.3
Catalan translation. New strings translated.
Merge pull request #423 from tornel/translation

Update Spanish Translation
Merge pull request #424 from sbenejam/master

Catalan translation. New strings translated.
UI: fixed manual editing of speed dial milliseconds
Updated changelog. Totally forgot the work done for Scripts