AdwViewSwitcher is styled totally different from GtkStackSwitcher

[ztefn]

The screenshots themselves should speak volumes, but let me summarize:

• In AdwViewSwitcher the buttons are not linked
• In AdwViewSwitcher the non-active buttons are not raised
• The buttons inside AdwViewSwitcher are much larger
• In dark mode the active button inside AdwViewSwitcher has lighter background instead of darker (inset) background