[Spinner] Fix/Add loading Spinners

[miclaus]

Components might trigger HTTP requests, which should show a loading spinner within the component itself and ( if necessary ) lock everything else until the response arrives and is handled.

Umbrella

• Home
  • All Mobiduls list
  • Nearby Mobiduls list
  • Own Mobiduls list
• Mobidul
  • Station lists (All stations, category stations list)
• MobidulCreator
  • Create Mobidul button
  • Save Mobidul button
  • Save categories button
  • Save menu button
  • Save options button
• StationCreator
  • Save Station button
  • Cancel Station button
  • Copy Station button
  • Delete Station button
• Play
  • Join Mobidul button
• Menu
  • Reset Rally dialog / button

Notes

It might be a good idea to implement loading spinner functionality within recurring components such as button.

Please feel free to comment/edit if there are missing components.

Thank you !