Created attachment 138291 [details]
Muon fails to display all lines in package description

SUMMARY
Muon has two issues with the display of package descriptions:
1. In the main window upper pane it's understandably displayed in one line only.
If the first line of the description in the package is longer than the width of the column, it's nicely cut with the last couple of characters fading out.
However, if you select that package, the whole Muon window width is instantly enlarged to cover the entire line, and sometimes this results in a hugely wide Muon window going off the right edge of screen.
2. In the lower pane with tabs for Details, Technical Details, Dependencies etc. where you would expect to see the whole text of description (in addition to the first line), you see the same behavior as above. Only one (the first) line is displayed, increasing the main window width to fit in the whole line instead of wrapping text, and excluding any other lines contained in the description in the package. 

STEPS TO REPRODUCE & OBSERVED RESULTS
1. Open Muon package manager, and go to (select) the package "alsa-utils", for example.
Description observed in both the upper and lower panes is "Utilities for configuring and using ALSA" only.
2. Add the source for balena-etcher USB image writer utility with this command: curl -1sLf 'https://dl.cloudsmith.io/public/balena/etcher/setup.deb.sh' | distro=ubuntu version=20.04 codename=focal sudo -E bash
3. Go to (select) the package "balena-etcher-electron", observing how the window is enlarged.

EXPECTED RESULT
1. Muon should not change any window geometry (e.g. width) when the first line of a package description does not fit the column width in the upper pane or the main pane width in the lower pane (Details tab).
2. Muon should wrap text to display the package description in the lower pane (Details tab).
3. Muon should also included the lines below the first line of package description in the lower pane (Details tab).

SOFTWARE/OS VERSIONS
Operating System: KDE neon 5.21
KDE Plasma Version: 5.21.5
KDE Frameworks Version: 5.81.0
Qt Version: 5.15.2