Adds a .desktop item into /usr/share/applications. (KanoComputing/peldins#217)
Merge pull request #25 from KanoComputing/start-menu

Adds a .desktop item into /usr/share/applications
Putting the desktop icon to the grid
kano-progress-register removed
Updated icon
Changed the desktop icon position

https://github.com/KanoComputing/peldins/issues/842
snake levels changed
Moved savelevel to after completing the exercise https://github.com/KanoComputing/peldins/issues/861
Changed copy
Changed playground to greater or equal 8
Made fast and medium modes a bit faster
Added control instructions
Changed copy
Updated kdesk icon file to identify if app is running
kano_profile and kano_world
Updated new desktop icons
Changed order of symbol and colour in Editor
If wrong theme name load minimal
Disabled autocomplete with TAB
deb: Reviewing for relase

Related-to: https://github.com/KanoComputing/peldins/issues/938