- Remove context menu for open in editor since there's a button now
- Faster pinch zoom
- Only pan when holding alt/option
- Fix transparent button on hover
- Updates api so extensions can track lifecycles of webviews
- Caches heights across reloads
- Improve rendering of loading indicator
- Use codicons for icons
For #271167
This makes it so our built-in extensions can mostly be built using `tsc` on the command line. Previously the extensions were picking up a lot of typing info from the root `node_modules` that meant they weren't truly independent
