Add an option to modify the font size of the app #1582
Merged
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This option is present in the new "Edit"->"Configuration" dialog. This modifies the font size of both Qt and matplotlib.
When the user modifies the font size in the dialog, most (but not all) widgets in the application are updated immediately. It appears that any widgets with custom style sheets do not get updated. Perhaps some other types of widgets don't get updated either. But restarting the application normally appears to update everything to the new font size.
It would be nice to get all widgets to update immediately when the user modifies the font size. But for now, we can just present a warning that the user should restart the application normally in order to get all widgets to update.
Fixes: #1575