Feature/groups

[TheLastProject]

Group management:

• Create groups
• Rename groups
• Delete groups

Card management:

• View groups (in edit view)
• Edit groups

Import/export

• Import/export groups with cards

Filtering:

• Group filtering

Unit testing:

• Create group
• Rename group
• Delete group
• View groups of card
• Edit groups of card
• Group filtering
• Hiding of group options if no groups exist
• Import/export

[TheLastProject]

This seems done now. I've been looking at your code all the time @arshbeerSingh, feel free to look at my code and tell me if you have any opinion (this feature took much longer to make than I expected so I've probably made some mistakes I can no longer properly see) :)

[arshbeerSingh]

@TheLastProject thank you very much for giving me the opportunity to review your code.
I will go through your code and would provide suggestions (if any) that I think would be helpful

[TheLastProject]

@arshbeerSingh Don't get me wrong with me merging this, you are still welcome to review, but I'd like to give translators a chance to translate and then get this out in a beta release :)

[arshbeerSingh]

@TheLastProject I understand. Sorry, I was not able to review your code or fix the assigned issues in the past few days as I was preparing for my school exams.

[TheLastProject]

Exams are more important! Good luck with them!

[arshbeerSingh]

Thank You very much @TheLastProject