Improves dfanout and seq snippets

[vnadot]

add all the "Write Parameters" (8 for dfanout, 10 for seq)

https://epics.anl.gov/EpicsDocumentation/AppDevManuals/RecordRef/Recordref-17.html
https://epics.anl.gov/EpicsDocumentation/AppDevManuals/RecordRef/Recordref-34.html

[vnadot]

Add a dedicated snippet for all SELM. Here is for "all"

# reset scope and chopper alarm counter
record(seq, "${P=CEA:}ResetAfterPmSeq0") {
    field(DESC, "reset scope and chop alrm cnt after PM")
    field(SELM, "All")
    # OUT 0 : reset scope
    field(DOL0, "${P=CEA:}PmRstRb CP")                 # get value to write from this PV
    field(LNK0, "SL-MPS-SBCT:MPS-ADCS-1:NSMP.PROC PP") # write value to this PV
    field(DLY0, "0.0") # sec
    # OUT 1: chopper - reset chopper max time response
    field(DOL1, "${P=CEA:}PmRstRb")
    field(LNK1, "${P=CEA:}ChopMaxResponseTimeRstCmd PP")
    field(DLY1, "0.0") # sec
    # OUT 2: chopper - reset counter
    field(DOL2, "${P=CEA:}PmRstRb")
    field(LNK2, "${P=CEA:}ChopAlrmRstCmd PP")
    field(DLY2, "0.0") # sec
}