Improve appearance

[vjik]

Q	A
Is bugfix?	❌
New feature?	❌
Breaks BC?	❌
Fixed issues	-

• Add hover to toolbar tabs
• Prevent selection in toolbar header
• Add special cursor for resize area in toolbar

[arogachev]

A screen recording GIF could be useful for visual demonstration of changes (if you have time, of course).

[vjik]

Sure:

[samdark]

👍