- avoid duplicate call of LRC's setTopAccount()
- welcome view displays always the first account on the list, so passing the index is not necessary
- conversationsadapter and messagesadapter no longer listen to currentAccountChanged signal since there is a specific function for the setup
Gitlab: #12
Change-Id: Iac932d2596bf59c7528d83be799342ccefeea6b0
Account combo box dropdown indicator will be hidden behind the
share qrcode button when the username is too long.
Gitlab: #16
Change-Id: I24d723be1f064a4e0328e262f11238b5c0d6943f