• GtkTreeViews with Buttons need a unified look (inline-toolbar or not, button with icons+label or only icons, symbolic vs. colored icons, position of toolbar - horizontal vs. vertical)
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• GtkStackSwitcher vs. GtkNotebook (if to use GtkStackSwitcher in place of GtkNotebook and if yes, under which circumstances) - see xfce4-notifyd-config for an example of GtkStackSwitcher

• On Focus and Settings tabs, some keyboard accelerators are highlighted by default. Doesn't happen when the dialog is run as standalone.

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