Refactor vertical-tabs.css to center align tab items 

Update zen-browser.js 

Merge branch 'main' of https://github.com/zen-browser/desktop 

chore: Update @zen-browser/surfer dependency to version 1.3.7 

chore: Update vertical-tabs.css to remove margin-bottom on #newtab-bu… …tton-container

chore: Update right-side compact mode CSS for vertical tabs 

Fix zen-browser#1081 

Add https:// scheme if URL doesn't contain one 

Fixed split view shortcuts 

chore: Update subproject commit reference