manage tags page should use pager

If you have a lot of tags (like hundreds of tags) and you visit the Manage Tags page, you may get javascript timeout errors.

It seems to happen because the new in-place edit javascript code has to run on hundreds of objects.

I think the best solution would be to add a pager and display only 50 or 100 tags per page.

CiviCRM seems to ship with both an AtoZ pager and a ajax pager (for manage groups).

If a pager is the right solution - open to suggestions on the best pager to use.