## Related Ticket(s)
- Fixes#3314
## Short roundup of the initial problem
When the view was sorted in the manage sets window, the "Enable/Disable All" buttons never toggled to "Enable/Disable selected" buttons, even when more sets were selected.
## What will change with this Pull Request?
- Selected sets can be enabled/disabled in sorted view as well
* search field added; sortfilterproxy displayed in treeview
* searching works properly
* moving with filter on works; view isnt't updated yet
* clangify & view updating figured out
* moving disabled when sorting is active
* drag&drop disabled when view sorted
* clangified
* foreach replaced
* button rename & SORT_RESET defined
* changed variable names
* 'x' button added & searchlabel text modified
* 'enabled' column won't grow anymore
* column resize improvement
* button hint & restore original order added
* moving with filter on works; view isnt't updated yet
* sort disable build in column headers (3 clicks)
* codacy fix
* typo + wording
* background color for warning
* buttons moved down a bit
* clicking "default order" button will hide the warning text
