Fix unwanted autosync on recipients save

[dominikschulz]

Fixes #793

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@b6fa4a8). Click here to learn what that means.
The diff coverage is 0%.

@@            Coverage Diff            @@
##             master     #848   +/-   ##
=========================================
  Coverage          ?   64.18%           
=========================================
  Files             ?      170           
  Lines             ?     9669           
  Branches          ?        0           
=========================================
  Hits              ?     6206           
  Misses            ?     2693           
  Partials          ?      770

Impacted Files	Coverage Δ
pkg/store/sub/write.go	33.33% <ø> (ø)
pkg/store/sub/move.go	63.64% <ø> (ø)
pkg/store/sub/recipients.go	55.03% <0%> (ø)

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