Firo-QT cosmetic fixes

[firstcryptoman]

1. Dropdown Sizing in Comboboxes #1416

Fixed oversized dropdowns that covered other UI elements. Adjustments:

Made combobox indicators transparent. Set a max-height of 25px for dropdown items.

2. Top Bar Text Visibility on Fedora #1354

Improved the top bar's text visibility by explicitly setting the text color to black, ensuring it does not rely on the OS's default colors, which caused readability issues.

3.Backup Wallet Menu Font Readability with Dark UI Theme #1422

Enhanced the readability of the folder's fonts in the "Backup Wallet" menu when using a dark UI theme.

Summary by CodeRabbit

• Style
  • Updated the menu bar items to have black text color for improved readability.
  • Enhanced dropdown elements' styles with transparent indicators and adjusted maximum height for better user interface consistency.

[coderabbitai[bot]]

Walkthrough

The update introduces visual enhancements to the application's user interface. It focuses on improving the aesthetics and usability of various elements. Menu bar items now boast a sleek black text color for better readability. The styling tweaks in the CSS file refine the appearance of combo boxes, ensuring a polished and consistent UI experience.

Changes

File(s)	Summary
src/qt/bitcoingui.cpp	Set menu bar items' text color to black.
src/qt/res/css/firo.css	Enhanced styling in firo.css: - Made QComboBox::indicator background transparent. - Added max-height: 25px to QComboBox::item.

🐇✨
In the realm of code, where changes abound,
A rabbit hopped in, improvements found.
Black text, transparent cues, all around,
A cleaner UI, in beauty, unbound.
Hop, hop, hurray, for the changes profound!
🌟🐰

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