Update password.php

Semicolons instead of colons in  switch statement.
Merge pull request #226 from xzaara/patch-2

Fix error handling
Add rcube_plugin_api::get_plugin() method
Update changelog
Fix setting flags on servers with no PERMANENTFLAGS response (#1490087)
Shrinked some images with TinyPNG (saved 38%)
Update rcmail.php

Typo
Merge pull request #228 from andryyy/patch-1

Fix typo in error message label