XRF scan added to queue

Added XRF scan to queue. Main problems that could appear:
- not sure about correct signal names. I tried to not overlap with energy scan
- not sure how to deal with directory, because here we use different hierarchy that at esrf. Maybe we could decide if, then case maybe?
- also here is not added actual graph plot. Still it is on the brick level. The idea could be to include graph plots in HO, like in energyscan case
- also maybe some channels are changed. Could not decide how better leave them