Created attachment 118944 [details] Show the default window size Settings window have no minimum size. SUMMARY When I open software for the first time many applications has no defined minimum size in the config/settings window. Much other software has the same problem. STEPS TO REPRODUCE 1. Open KMail at first time 2. Go to Settings > Configure KMail 3. OBSERVED RESULT The window has no minimum size defined EXPECTED RESULT Minimum size to best fit the features SOFTWARE/OS VERSIONS Linux/KDE Plasma: OpenSuse Tumbleweed 20190318 - Kernel 5.0.2-1 default (available in About System) KDE Plasma Version: 5.15.3 KDE Frameworks Version: 5.55.0 Qt Version: 5.12.0 ADDITIONAL INFORMATION