Add status icon system for display buttons

[mrbuds]

Description

This allow display buttons to have a list of status icons
Loaded icon and Warning icons are moved to this list
Groups shows an icon per unique status icon of each leaf

This solve a few ux issues:

• warning icon could show only one warning, now it can show multiple warning on same button
• warnings were not spread to parent group(s), user had to expand them
• with nested groups this help identify which ones have auras with different loaded status

WowClassic_2024-01-20_17-30-44.mp4