Improve notification

[sonle-geekyants]

Describe the remaining issues

• Both desktop and mobile versions have these same UI issues

• Unselected notification button
  Expected:
  
  Actual:
  

• Sending queue
  Expected:
  
  Actual:
  

• Notification cards
  Expected:
  
  Actual:
  

• Expanded card
  Expected:
  
  Actual:
  

• Missing ! and Error badges
  

• sending and files must have the first letter uppercase and need to adjust the spacing
  Expected:
  
  Actual:
  

• All items (including cards and badges) of the mobile version in design seem to have different padding and sizes compared to the desktop one

• Maybe try to use shrinkWrap for ListView instead of using fixed height

• Some fontWeight are not as same as the design

• We need to remove the unread counter on the notification icon after tapping in

• About a "Cancel" button - Should we need to add it to the app?
  

[sachins-geekyants]

Updated the design in this PR : #342

[sonle-geekyants]

Updated the design in this PR : #342

@sachins-geekyants Added some new issues!