[2.16.1] Wrong navbar colors

### Description
Just tried out 2.16.1 from F-Droid. I'm glad to see many of the issues repored in 2.16.0 are resolved. There's still one pending issue though. For some reason, on any screen other than "home" (file picker), the system navbar has the wrong colors. It's set to light on light. This makes it very hard to see the icons on it - you can just barely make out the shapes because the icons happen to have a subtle shadow. This was working correctly in 2.15.2.

On top of that, Markor's bottom toolbar (in view and edit) used to be light-grey (nice visual separation) whereas now it's white (visually blends with the actual document). Would be nice to have the light-grey back.

I'm using the light theme.

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**Behavior/visuals in 2.15.2:**




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**Behavior/visuals in 2.16.1:**



### Information
Android version: 16
Device: Samsung A53
App Version: 2.16.1
Source: F-Droid

Reproduce the issue on Android 16 with Markor 2.16.1 in the light theme, checking a non-home screen and the view/edit bottom toolbar. Compare the navbar and toolbar colors with 2.15.2. Done means the system navbar icons are clearly visible and the bottom toolbar has the prior light-grey separation.

Written by the indexing model from the issue text.