Fixed color differences in dark themes

[Godmartinz]

Description

This fixes miscellanous color problems in the dark themes. Some columns in tables were different colors those have been correct as well as the following:

Below Custom fields were a bit unreadable. this makes all custom field tags more legible across the board
Before:

After:

Below the action buttons located everywhere were receiving different shades of color that were intended for links only. Now they stay perma-white
Before:

After:

The Black dark theme notifications when hovered upon were unreadable
Before:

After:

Fixes #SC-23161

Type of change

Please delete options that are not relevant.

• [x ] Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Test A
• Test B

Test Configuration:

• PHP version:
• MySQL version
• Webserver version
• OS version

Checklist:

• I have read the Contributing documentation available here: https://snipe-it.readme.io/docs/contributing-overview
• I have formatted this PR according to the project guidelines: https://snipe-it.readme.io/docs/contributing-overview#pull-request-guidelines
• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[shortcut-integration]

This pull request has been linked to Shortcut Story #23161: Misc errors in dark skins.

[what-the-diff]

PR Summary

• New button class for action buttons
  Added a new button class to improve the UI for action buttons.
• Improved readability for dark themes
  Adjusted colors in dark skins (orange, red, yellow) for better readability and consistency.
• Fixed visibility of custom fields in dark themes
  Resolved an issue where custom fields were not displayed on models or fieldset pages while using dark themes.