Change font of point-probe area

[ameraner]

(Ported from EUM Gitlab issue 174)

Currently, the font of the point-probe values is different compared to the rest of the GUI. In particular, the font is larger and wide, so that on a smaller screen, or with multiple SIFT tabs open, the displayed information is often hidden and not readable.
If possible, this should be uniformised to the rest of the GUI.
In addition, the wavelength field could be removed, in order to make some more space to better display the point probe values.