fix ref window height when pinned

[MarkE16]

Description

fix ref window height not taking full viewport height when pinned. Also added zoom in/out options in menubar.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that causes changes to existing functionality, possibly impacting existing features)

Have you tested your changes?

• I wrote tests for the code I've written.