Clean up and recalculate "calculated" fields after a project import

When importing an Xray project, the Requirement Status and Test Run Status fields will often end up with wrong values after importing.

Then, there may be several different and separate steps for the user to take to fix this (reset test run status - reset requirement status - recalculate requirements - reindex).

Xray should either perform these steps on its own, or provide the functionality to perform a recalculation of tests and requirements for a single project and then reindex that project, all in one user action.