Merge master into next

Change-Id: Iffdce6345b6856513258706324b25a0539faca46
Merge topic '13872_sliceview_default' into next

f648756 Modify MultSlice tests for new default view.
0f0368d Fix compile errors and warnings on Linux
260d706 Add X-Y-Z slices at dataset center for Slice View default
Merge topic '13899_log_axis_warning' into next

2ba9371 Change what generates log-scale axis warnings.
fe6ce71 Bring VTK forwards to catch chart API addition.
dc7e9fb Warn when log-scaling axes w/ zero-crossing data.