removed dialog on Android
Merge branch 'DA-423' into unstable

* DA-423:
  removed dialog on Android
fixed some typos
small refactorings
(iOS) highlight timeline tab when timeline is changed
Merge branch 'DA-402' into unstable

* DA-402:
  (iOS) highlight timeline tab when timeline is changed
  small refactorings
  fixed some typos
update UI on main thread
Merge branch 'DA-402' into unstable

* DA-402:
  update UI on main thread
<DA-404> add gps check before starting
<DA-404> Merge branch 'unstable' into DA-404
<unstable> Merge branch 'DA-404' into unstable
Merge branch 'unstable' into DA-406

* unstable:
  <DA-404> add gps check before starting
  update UI on main thread
  (iOS) highlight timeline tab when timeline is changed
  small refactorings
  fixed some typos
  removed dialog on Android
workaround for bogus "cancel" button in navigation bar of twitter authorisation screen