Add list of headers included by mantidqt.sip

BASIS IDF contains duplicate detector IDs

T0 no longer doubled with DetCal file

NSIS version 3 compatibility

Re #19893 Resolved merge conflicts in TimeSeriesProperty

We had deviated a little over the years and this makes the diff more
readable.

ISIS Reflectometry: Changed pause button

Add Validator to NumSteps in PeakintensityVsRadius

Improve performance to splitting logs in FilterEvents

CMake has no way of determining that there is a dependency unless
they are manually specified in this way.

Reflectometry interface: Introduce autoreduction button

Fix unit test for clang on Linux, same as osx

Added validation for event workspaces in ConjoinWorkspaces

- The DEFAULT_NUM_STEPS constant had both auto and int type specifiers this commit removes the int.

- Removed the unused NumSteps parameter from the PeakIntensityVsRadius test helpers.
- Removed the unused m_alg member variable from the PeakIntensityVsRadius suite class.

Indirect - Diffraction - Check 'Use Vanadium' checkbox before using vanadium files