Text for projectdoc Rebuild on Admin Screen

The text

"During the rebuild the site should be in read-only mode and is probably not usable. Note that the projectdoc Toolbox provides REST services to run the process on sets of spaces."

is not correct.

For one, it is not the site that is not usable, but the spaces with projectdoc documents that have not already been rebuilt.

Second, it is not possible to do an upgrade or an rebuild on single spaces. These two modes can only be run on a site. The documentation of the REST services address this correctly.

The text should read:

"During the rebuild the spaces with projectdoc documents are probably not usable. Consider to set them read-only. The process may complete quicker, if every space with projectdoc documents has a projectdoc homepage."

We should also render the link to the manual in the projectdoc Refresh section.