* [web] provide an actual rootFolder from EditorProviders in tests
- Fixup SocketIOMock and ShareJS mocks to provide the complete interface
- Extend SocketIOMock interface to count event listeners
- Fixup test that did not expect to find a working rootDoc
* [web] expose imageName from ProjectContext
* [clsi-cache] check compiler settings before using compile from cache
* [web] avoid fetching initial compile from clsi-cache in PDF detach tab
GitOrigin-RevId: e3c754a7ceca55f03a317e1bc8ae45ed12cc2f02
