Refactor time periods and UI for app banner

[samuelwei]

Type (Highlight the corresponding type)

• Bugfix
• Feature
• Documentation
• Refactoring (e.g. Style updates, Test implementation, etc.)
• Other (please describe):

Checklist

• Code updated to current develop branch head
• Passes CI checks
• Is a part of an issue
• Tests added for the bugfix or newly implemented feature, describe below why if not
• Changelog is updated
• Documentation of code and features exists

Changes

• Cleanup code by using the same time periods for multple app settings
• Always show all app banner settings to prevent issues with form validation errors

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.81%. Comparing base (3e6fa7f) to head (3001172).

Additional details and impacted files

@@            Coverage Diff             @@
##             develop     #968   +/-   ##
==========================================
  Coverage      95.80%   95.81%           
- Complexity      1082     1085    +3     
==========================================
  Files            178      178           
  Lines           3842     3845    +3     
==========================================
+ Hits            3681     3684    +3     
  Misses           161      161           

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