To map Priority to an MS Project field, we need to select it in the 'Field' combo box:
Unlinked tasks/new issues: If Text5 is blank, the new issue Priority will be still set to 'Major'. If Text5 is not blank,
then Priority will be set to the value of Text5 for the task. Apparently, for the synchronisation to work, Text5 needs to
be either blank or to contain valid issue priority names.
Linked tasks/existing issues: Likewise, if Text5 is blank, the new issue Priority will be still set to 'Major'.
If Text5 is not blank, then Priority will be set to the Text5 value.
Import: If the imported issue Priority is 'Major', Text5 will be left blank. If it is different, Text5 for the new task
will be set to the original issue priority (e.g. 'Trivial'). Now if we try to synchronise the new task, Ceptah Bridge
will not find any differences regardless of the original Priority value because the latter matches either the default Priority
or the Text5 value, if entered.