Marketers Delight 5.2.1.x 5 changes

Released: January 29, 2021

• Resolves error messages when all popups are deleted
• Removes z-index on .button classes, reduces .image-overlay z-index to 0 to prevent stacking issues.
• Applies menu links color settings to .header
• Simplifies .logo and .site-title CSS selectors
• Fixes Admin bar header submenu CSS glitch