Refs #8072 Tidying ApplyCorr and adding option for corrections file.
Refs #8072 Missed file extensions on file browser.
Refs #8072 Reset default opening tab.
Refs #8072 Change scale label to be more specific.
Refs #8072 Change extension on geometry change.

Also made scaling more clearly apply to can file only.
Merge remote-tracking branch 'origin/feature/8072_tidy_apply_corr'