Update Keyboard Shortcuts page and more

Sabri Ünal requested to merge (removed):invasivefix into master
  • Remove shortcut labels from the menu
  • Remove shortcuts labels from the thumbnail menu
  • Update GTK version to support automatic help overlay
  • Rearrange and fix shortcuts page to support automatic help overlay
  • Remove old shortcuts page codes
  • Add a new shortcut for Keyboard Shortcuts page
  • Move space shortcut to cheese-window.vala
  • Add F1 shortcut for help and reorder some items
  • Improve shift-delete shortcut definition
  • Add three shortcuts to Keyboard Shortcuts page
Edited by Sabri Ünal

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