feat: support ipfs daemon --offline#936

Draft

BrianBelhumeur wants to merge 5 commits intoipfs:mainfrom

BrianBelhumeur:fix/offline-mode

Commits on Oct 21, 2020

WIP: enabling context and tools menus to allow local pinning when IPFS daemon is running in offline mode
Brian Belhumeur
committed
Merge branch 'master' of https://github.com/ipfs-shipyard/ipfs-companion into issue790
Brian Belhumeur
committed

Commits on Oct 23, 2020

Change >= 0 to > -1 for consistency
Brian Belhumeur
committed
refactor: separate 'api down' from 'offline' state
lidel
committed
feat: precache using public when in offline mode
lidel
committed