Update submodule oh-my-zsh 7b4d286...311ef2c

* oh-my-zsh 7b4d286...311ef2c (2):
  > git plugin: command_with_files for gcm/gcma, alias updates
  > minor arg reordering
Update submodule oh-my-zsh 311ef2c...1fe2ab8

* oh-my-zsh 311ef2c...1fe2ab8 (2):
  > git: improve current_branch/current_repository
  > theme: use a single function again, call it with 'reset-prompt' action