Fix pt decoding below 1 GeV in mb chains applying cut on track pt (e.g. exclusive chains)
The issue was that the threshold was always rounded to initeger and pt02 was identical to pt2. Now there is an explicit designation of fraction (by letter p == point - as used elsewhere in trigger).
The bigger problem in this chains was that they were not runnign tracking at all because had "sp" algorithm rather than "excl". This is fixed in this MR as well (precedence issue).