Fix mobile views / layout

[AndyRae]

Changes

• Fixes rendering on small screens, there were many issues with the new UI that are now resolved.
• Creates consistency between UI elements (titles similar sizes, navigation in the same place)
• Removes bootstrap from Next app
• Fixes change password links

Checks

Important: please complete these before merging.

• [x] Run migrations, if any.
• [x] Update changelog.md, including migration instructions if any.
• [x] Run unit tests.

[github-actions[bot]]

Tests	Skipped	Failures	Errors	Time
25	1 :zzz:	1 :x:	0 :fire:	4.257s :stopwatch: