ui: implemented data-y-max for timeseries widget
implemented http_websocket_only, enterprise backwards compatibility helper
patch version bump to 1.2.2
doc: added hacking page
fixed a bug in the gauge explorer plugin
patch version bump to 1.2.4
fixed a bug where zero-config-gauges were not properly initialized when running with :http_websocket_only
improved average gauge value calculation performance, version bump to 1.2.5