Update OFFSPEC IDF

spectrum index corrections to workspace index or spectrum number

Fix OS X packaging with Poco 1.6

Generate ninja build script if the tool is found

Engg GUI:: customised bank name & output names fixes + other improvements

Make AlignComponents use method='L-BFGS-B' in scipy.optimize.minimize

Apply clang-tidy modernize-use-override to testing headers

Add an option in the BASISreduction algorithm to divide the structure factor by vanadium data

Fix cppcheck unusedVariable warning.

cppcheck 1.72 errors 

ALC: set last run directory to the same as selected first run

re #15450

Modified hard-coded detector IDs in FakeISISHistoDAE

Remove QLines algorithm for BayesQuasi

re #15450

Refs #15551

I have kept a local copy of the old IDF in case users change their mind

Refs #15551

re #15281

Handle positive images (MaxEnt)

In LoadIsawDetCal, use the standard library instead of handwritten loops .

refs #15337