- boring rewrites and cleanup while doing file service work:
- many more UI objects now store and do file service logic using a more complicated 'location context', which can store a mix of multiple services and 'deleted from service' data. all the search code that works on this can now propagate to display:
- the management objects behind every page now store a multiple location object, not a single file service id
- all media panels (the thumbnail grid on a page) are now instantiated by a multiple location object, and when they serve a highlighted downloader, they now inherit that from the file import options, which in future will dictate import destinations
- all canvases are now the same, inheriting their new location context from their parents
- all tag lists are the same. mostly they don't care much about file domain, but when you middle-click to create new pages from the autocomplete dropdown list or active search list, it can matter, so they now propagate it along
- the underlying medialist objects are now the same, and various delete logic (e.g. 'should we remove this thumb we just deleted?') is updated to work on complex domains
- some duplicate lookup code now works on location context
- renamed 'location search context' object to 'location context' since it is used all over now and put it in its own file. also wrote it some neater initialisation and meta object code
- mr bones now gives duplicate data based on the union of all non-trash local services sans update files (another case of now supporting n services but n is fixed for the moment at 1, 'my files')
- a bunch of places across the program that used to default to 'my files' or 'all local files' (which is everything on disk, including trash and repository update files) now default to this new union of all non-trash local media services
- when doing page-to-page file drag and drops, the location context is now preserved (previously, the new page would always be 'my files')
- whole heap of other cleanup in these systems
- when a thumbnail cannot be provided (for deleted files or many 'all known files' situations), the thumbnail cache now provides the hydrus icon stand-in instantly, no delayed waterfall
- fixed an unusual situation where the file search could not provide a file in a tagless search when that file had no detailed file info row in the database. this seems to effect a legacy borked row or two in the new deleted file domain searches
- removed some ancient dumper status code from thumbnail objects