Adjust buginfo dialog size
Test Plan
When using a windowing system that doesn't resize dialogs that are bigger than the screen (xfce)
Help -> Show system information for bug reports
Formalities Checklist
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I confirmed this builds. (Ubuntu 20.04) -
I confirmed Krita ran and the relevant functions work. (Gnome and xfce) -
I tested the relevant unit tests and can confirm they are not broken. (If not possible, don't hesitate to ask for help!) -
I made sure my commits build individually and have good descriptions as per KDE guidelines. -
I made sure my code conforms to the standards set in the HACKING file. -
I can confirm the code is licensed and attributed appropriately, and that unattributed code is mine, as per KDE Licensing Policy.