Annoying getting all the "Please wait while tags are built" dialogs

[drewish]

When ever you've got the tags building there's a lot of actions that will trigger a "Please wait while tags are built" dialog box, specifically right clicking is annoying.

It'd be great if things that aren't specifically requiring the complete ctags file could not complain so loudly.

[deathaxe]

This is controlled by "display_rebuilding_message" setting.