Version 150

• added an 'idle' updating processing mode that churns through tags four times faster but makes gui laggy. it will kick in whenever you haven't done anything in thirty minutes
• improved some gallery downloader status texts
• gallery downloader will no longer wait 5 secs before fetching first page of urls
• fixed a critical race condition that had a chance of causing complete and unrecoverable gui freeze in the gallery downloader code
• fixed rendering of some bizarro pngs that CV couldn't understand
• fixed tag parent management for admin users
• fixed up some tag parent dialog code
• tag sibling dialog now accepts single reasons for multiple pairs, like the tag parent dialog
• improved error state on rendering video that reports resolution of 0x0
• removed looping error reporting on certain static image rendering errors
• fixed an error when some thumbs were 'collected' while fading in
• tagboxes now select on home/end and support numpad versions of page up/down
• fixed a radio button initialisation bug
• boosted the initial size of the 'set default advanced tag options' dialog so the collapsible pane is more visibile
• silenced a upnp error when external ip can't be parsed
• reduced some tag dialog previous/next button lag
• general code cleanup and refactorisation
• gui flag refactorisation and unification
• refactorisation of most non-constant stuff from constants files
• refactorisations of media mixins class in prep for a general rewrite of that code
• improved client initialisation of default options, boorus, and imageboards