Known: Hashtags on a duplicated page cannot be found

[stevencohn]

Problem to Solve

When a page containing hashtags is copied or duplicated, the tags are not recorded in relation to that new page. Internally, this causes a DUPKEY exception in the database. Catch this and generate a new internal MoreID for the new page.

When a page containing hashtags is deleted, tags on the page are still searchable until the next scan. This can result in a bad link from the Find Hashtag dialog. Catch this and report it as a bad link to the user.