[kloptops]

Text sizes in the default theme were set by aspect ratio only. So 960x720 and 1024x768 got 640x480's sizes, and 1920x1080 got 1280x720's, about 60% of what they needed. Text now scales with the screen's height: there's a font-scale per resolution, after the aspect-ratio ones, which stay for other screens.

Layout

• The ports and themes lists placed their info and description in pixels from the top of their pane. On bigger screens the text overlapped, and a fourth info line (two runtimes, for example) overlapped at 640x480 too. They're now fractions of the pane, made from each aspect ratio's own size, with room for four info lines.
• The 16:9 and 1920x1152 info and description sizes, which made them smaller than the rest of the screen, are gone.
• Port info has bigger text, and it scrolls when it doesn't fit.
• The options list is wider, so "Experimental Ports: Disabled" fits.

Disclaimer and startup warning: this built-in section (the piracy disclaimer and the unsupported-system warning, the same in every theme) had no sizes for 720x480, 960x720, 1024x768 or 1280x800. Those got the unscaled size; at 1280x800 the text filled barely a third of the box. They're filled in now, between their neighbours' sizes.

Runtime manager: it showed {runtime_info.name} and the like until the selection moved. Its first update_selection() only ran when there were no runtimes. It now runs whenever something is selected, and test_gui_commands.py checks it.

Testing: every screen checked at 12 resolutions with the theme preview server (on beta, same theme.json). The full suite passes on Python 3.7 and 3.11.