Created attachment 133332 [details]
qapt UI error

SUMMARY
Properly handle virtual packages, since in ubuntu 20.10 libgcc1 became virtual and qapt can't a lot of packages.

https://invent.kde.org/system/libqapt/-/blob/5a8510ab27dec3fca2c91f1469eebf146e70bfe6/utils/qapt-deb-installer/DebInstaller.cpp#L418

STEPS TO REPRODUCE
1. try to install deb package that have libgcc1 as dependency on kubuntu 20.10 for example
2. aqpt will say that dependencies are not met

OBSERVED RESULT

$ apt-cache show libgcc1
N: Can't select versions from package 'libgcc1' as it is purely virtual
N: No packages found
$ apt-cache showpkg libgcc1| tail -2
Reverse Provides: 
libgcc-s1 10.2.0-13ubuntu1 (= 1:10.2.0-13ubuntu1)
$ apt-cache show libgcc-s1 | grep libgcc1
Provides: libgcc1 (= 1:10.2.0-13ubuntu1)
Replaces: libgcc1 (<< 1:10)


EXPECTED RESULT
installation should work

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 5.19.5
KDE Frameworks Version: 5.74.0
Qt Version: 5.14.2

ADDITIONAL INFORMATION
qapt-deb-installer 3.0.5-1ubuntu1