Handle conflicts with browser shortcuts

Problem to solve

The Web IDE Beta introduces new workflows and shortcuts, some of which conflict with browser shortcuts.

Proposal

Not quite sure how to handle this one. We probably shouldn't hijack browser shortcuts but we don't want to close the Web IDE when people (justifiably) think they can close the current tab by using CMD/CTRL + W.

Details

See https://code.visualstudio.com/docs/editor/vscode-web#_keybindings for some known conflicts and workarounds.

List of shortcuts we know conflict:

Keyboard shortcut	Action	Layout	What happens
CMD/CTRL + W	Close tab	all
CMD/CTRL + T	New tab, when used as a shortcut chord following CMD/CTRL + K)	all
CMD/CTRL + Z	Undo action	German/Swiss keyboard
CMD/CTRL + V	Paste	US-mac	cmd + v copies the relative file name into IDE, not the copied contents.
CMD/CTRL + R	Reload
CMD/CTRL + +-	Zoom in/out	German keyboard	cmd + adds a tab indent, cmd - inserts a HTML comment.
F5	Reload		opening the Run and Debug tab