Implemented working shortcuts into Dynamo + shifting of styling file
Added IsEnabled property and command parameter for shortcutitem
Merge in toolbar to ChocoButterUI
Adjust toolbar styling + added button image adjustments to make images sharper
Styling resource adjustment as previous styling affects entire window
Shifted shortcutBar into UserControl
Use shift modifier to pan, use alt to zoom

Conflicts:
	src/DynamoCore/UI/Views/DynamoView.xaml

(cherry-pick)
Changed keybindings for zoom & pan, to ctrl-+ and ctrl-- (matching DesignScript and Adobe CS) and ctrl-alt-dir respectively, added menu items so these are documented and discoverable

Conflicts:
	src/DynamoCore/UI/Views/DynamoView.xaml

(cherry-pick)
Added Zoom in and out GUI control at the top right corner.
- Limit Zoom within 10% to 400%
- Zoom in and out with button, will zoom in center of viewport
Fixed Zoom using mouse and pan issue

Zoom in using mouse will change the position of the Workspace but was not updated.
Therefore it will skip the position.
Restructure zoom code to MVVM model using eventhandler
Implemented Fit to view function and added UI at top right

Added Shortcut:
   Ctrl + 0 : Zoom and fit all node in the view
   Ctrl + 0 again : Toggle between Auto Zoom Fit view and 100% Zoom
Modified shortcut UserControl to take items instead of self init
-Modified shortcut UserControl to take items instead of self init
-Minor UI adjustments
Merge branch 'ChocoButterUI' into chocoMergeShortcutToolbar
Modified shortcut bar creation
Merge pull request #477 from l2obin/ZoomPanControlBranch

Added Zoom and Fit to view UI at top right
Merge branch 'ChocoButterUI' into chocoMergeShortcutToolbar
Added UI Toggle button for pan mode at top right
  In pan mode, left click can also be use for panning instead of middle click.

  Added shortcut: Escape to exit from pan mode
  Modified Cursor: With hand_pan and hand_pan_active during the pan
Merge pull request #490 from l2obin/PanControlBranch

Added Pan UI at top right for toggle between pan mode
Merge pull request #489 from SkyApple/chocoMergeShortcutToolbar

Implemented Shortcut Toolbar