* cover caching overhaul
* add ui for removing custom cover
* skip some loading work
* minor cleanup
* allow refresh library metadata to refresh local manga
* rename metadata_date to cover_last_modified
* rearrange removeMangaFromLibrary
* change custom cover directory
add setting for updating cover when refreshing library
* remove toggle and explicit action for updating covers
* Use a wrapper around Manga to supply glide with proper equals() and hashCode() impl. for caching
* reload image if url has changed
* ignore case for http scheme comparison
* more ignore case for http scheme comparison
* fix indenting
* use data class for MangaThumbnail
* Add LibraryUpdateRanker
This class provides various functions to generate Comparators that can
be used to order the manga to update.
One such ordering is by relevance:
It prioritises manga that were updated more recently.
Another Ordering is by lexicographic order:
This is the default behaviour.
* Use relevanceRanking scheme
Instead of default(noRanking/lex ranking) now mangaList is sorted with
relevanceRanking.
* Add UI and associated variables & strings for Update Ranking.
* Use user preferences to determine update ranking scheme.
* Refactor relevanceRanking to latestFirstranking.
This name seems to better reflect the ranking scheme and frees up the
name relevanceRanking for future use.
* Set latestFirst scheme as default.
(Changing over from lexicographic scheme)
* Fix 1
[Convert LibraryUpdateRanker to a object.](./files/82f263749f0ae775385b23dd919f1865360db969#r287513539)
[Nitpick: Add lines](./files/82f263749f0ae775385b23dd919f1865360db969#r287540256)
[Replace Java comparator](./files/82f263749f0ae775385b23dd919f1865360db969#r287539976)
[Nitpick: Add local variable](./files/82f263749f0ae775385b23dd919f1865360db969#r287514805)
* Fix 2
[Weird import](./files/82f263749f0ae775385b23dd919f1865360db969#r287513709)
[Default value](./files/82f263749f0ae775385b23dd919f1865360db969#r287540064)
[Use existing Strings](./files/82f263749f0ae775385b23dd919f1865360db969#r287514476)
[Use Library update order](./files/82f263749f0ae775385b23dd919f1865360db969#r287540204)
