fix(composer): Prevent composers in different windows to be out of sync

- Increase arbitrary wait time before closing window so Database ipc
messages can reach other windows with a higer success rate -- this
caused composers in different windows to be out of sync fairly often because the
database trigger event never reached them
- Clears commit timeout when commiting

src/flux/action-bridge.coffee

@@ -137,8 +137,8 @@ class ActionBridge
     # Electron won't actually send the message. To work around this, we wait an
     # arbitrary amount of time before closing the window after the last IPC event
     # was sent. https://github.com/atom/electron/issues/4366
-    if @ipcLastSendTime and Date.now() - @ipcLastSendTime < 50
-      setTimeout(readyToUnload, 50)
+    if @ipcLastSendTime and Date.now() - @ipcLastSendTime < 100
+      setTimeout(readyToUnload, 100)
       return false
     return true
 

src/flux/stores/draft-editing-session.coffee

@@ -61,6 +61,7 @@ class DraftChangeSet
     @add(changes, {doesNotAffectPristine: true})
 
   commit: ({noSyncback}={}) =>
+    clearTimeout(@_timer) if @_timer
     @_commitChain = @_commitChain.finally =>
       if Object.keys(@_pending).length is 0
         return Promise.resolve(true)