[Calva Hightlight] extension settings are uninitialized if no closure editor active on activation

[cfehse]

The Calva Highlight extension does not initialize the settings on activate if the active editor is of type clojure. This leads to uninitialized settings if no file open or a non clojure file is active during activation. During runtime the settings are not reloaded if they were changed.
The extension should load the settings regardless of any open files.