Merge pull request #278 from tornel/translation

Updates to the Spanish Translation
Simple Desk: CPU usage improvement. Should drastically drop down
Documentation: updated Show Manager doc (thank to Micheal Clements)
Monitor: added 2D view Fixture item editor. Can set position, rotation and gel color

Updated translations
Monitor: store vertical splitter position
Position tool: set focus to the area, so that keyboard control works without clicking
Spanish Translation (monitor)