UI Consistency glitch

### System Information

win10

### LMMS Version(s)

1.3 alpha

### Most Recent Working Version

non

### Bug Summary

Differences in UI background and font
As seen in image there are differences in both background-_colour_ and use of _capitals_ in UI

Personally i like the capitals. They are more readable, but uses more space, witch can be an issue on some widgets where realestate already is cramped
Its most likely that the 'odd' colour background is the one i marked with red, because the orange-marked is also used in the instruments back-panel.

### Expected Behaviour

UI should be consistent

### Steps To Reproduce

Open UI..

### Logs

Click to expand

### Screenshots / Minimum Reproducible Project

_No response_

### Please search the issue tracker for existing bug reports before submitting your own.

- [x] I have searched all existing issues and confirmed that this is not a duplicate.

Start by opening the LMMS UI on Windows 10 and compare its background colours and capitalization with the attached screenshot. Trace the widgets showing the marked differences; the issue is done when the relevant UI elements use consistent background styling and text capitalization without making cramped widgets unusable.

Written by the indexing model from the issue text.