Fixed 'Create Version' and 'Locate Version' spreadsheet buttons

packages/spreadsheet/spreadsheet_cell.py:
  We should now use locator, not controller, to find the view.

Ticket: 893
Fixed invalid alias when creating version from PE

Bugfix: Alias error when using spreadsheet button "Create Version"
Disabled module info resize fix on non-OSX platforms

gui/module_info.py:
  Only set stylesheet for Input/Output/Annotation labels on OSX
Reduced graphics view zoom range to half

gui/graphics_view.py:
 - QInteractiveGraphicsView:
   Reduced scaling range to half (on a power scale)

 - QInteractiveGraphicsView.viewPortEvent:
   Improved pinch gesture scaling
   Fixed properties not being a Variant after change to API v2

Bugfix: Pinch gesture was broken
Merge branch 'v2.1'