[fsmonitor] Avoid excessive logging
[windows] Switch dev mode from the Service Menu

Add a service menu option to enable development mode to override
backend and plugin folders when running a repository build.

When dev mode is enabled AND the current exe is located in
xxx\windows\bin\Whatever\ folder, LiveReload will use the backend from
xxx\node_modules\backend and plugins from xxx\plugins.

Switching the dev mode restarts LiveReload.

Additionally, an active backend override mode is indicated by
appending a star to the version number in the title bar.