Revert "Fix format_track_length test to correctly check for hours, not days"

This reverts commit f11685d74fbce76b304249c5b242b40cea08356a.
Revert "Use int(x + 0.5) rather than round()"

This reverts commit 25c681cf30bb731f42ce38fa2df10898097bec06.
Revert "Merge branch 'mbs-5765' into beta"

This reverts commit 3bfc49059b441a3a349bf03c75a62cbd0fe33867, reversing
changes made to b2837feca4f5c363840f39197e20ceb1c4ed7a1c.