Bug 435689

SUMMARY
Clicking the 'Stop' button in the 'search and replace' panel greys out the 'search and replace' panel. This means that after cancelling a search, the user cannot perform another search without restarting Kate.

STEPS TO REPRODUCE
1. Open the 'Search and replace' panel
2. Type in a string in the 'search' textbox
3. As the search scope, select 'In folder'
4. Select a big folder as the folder to search (so that the search will not finish before you actually click the 'stop' button; I chose '/' as the folder)
5. Begin the search
6. Press the 'stop' button

OBSERVED RESULTS
The stop button gets highlighted, and the whole panel becomes greyed out. The user cannot interact with the 'Search and Replace' panel. Pressing the 'Stop' button again has no effect. I can interact normally with the text area and the menu (File, Edit etc.).

EXPECTED RESULTS
The 'search and replace' panel should remain usable after cancelling a search.

SOFTWARE VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.21.4
KDE Frameworks Version: 5.81.0
Qt Version: 5.15.2
Kernel Version: 5.10.29-1-lts
OS Type: 64-bit
Graphics Platform: X11
Processors: 4 × AMD EPYC-Rome Processor
Memory: 1.4 GiB of RAM
Graphics Processor: virgl

ADDITIONAL INFORMATION
I could not find any processes in the background using a lot of CPU after cancelling the search, so it looks like while the search gets cancelled, the UI doesn't get updated.