Html fixes 24-10

Small html fixes

- Subcategory
- Edit topic/ New Topic
- code cleanup
Update html
Update html (part2)
Small update pagination
[develop][K3.1] Update backend css
[K3.1] Cleanup: remove k1.5 source images.
correct usage of semantics
create better structure pattern
i have added a better structure pattern

added on the other 2 rows
Update en-GB.com_kunena.views.ini
Adding nowrap

index page missing nowrap total topics
missing closing tag
Fix menu and some mobile view fixes
menu part2
add float
Merge pull request #2647 from 810/3.1-crypsis-24-10

Html fixes 24-10
Merge pull request #2666 from 810/cleanup

[K3.1] Cleanup: remove k1.5 source images.
Merge pull request #2662 from 810/3.1-backend-html

[develop][K3.1] Update backend css