Add an option to change to light theme & to match the app theme with system-wide theme color from gnome settings
I see two reasons for this:
- Dark theme can cause visual problems for pictures that possess black elements over transparent backgrounds (generated e.g. using alpha channel), the latter appearing black in Loupe. So black over black = we can't see anything
- Not everyone likes dark theme for photos.
Possible solutions: see option in top panel/hamburger used by gnome text editor 44
Edited by JB Ingram