Colorful Windows Enhanced v4.5.2

New Popup UI
The color picker now opens as an instant popup from the toolbar - no more new tabs.

Features:
- Quick Pick - 12 vibrant colors always visible at top
- Accordion sections - Presets, Harmony, Palette, Custom (collapsible)
- Color preview - See your selection before applying
- "Open in tab" - Link to full-page picker when you need more space

Fixes:
- Scrollbar no longer covers content (v4.5.1)
- No more double scrollbars in preset colors (v4.5.2)