Store and send documents modified offline#12

Draft

Bringoff wants to merge 4 commits intomasterfrom offline-refinements

+201-39

Commits on Nov 3, 2021

Fix retrieving 'added' documents from storage
Artem Kalachyan
committed
Place modified document ids to respective stores
Artem Kalachyan
committed
Send data stored in offline when connected again
Artem Kalachyan
committed
Use persistd cache instead of in-memory one
Artem Kalachyan
committed