Squish: Don't let test run into ScriptError...

...if former verification already fails.

Change-Id: I0a5d60f6a91158ed1decdedd8aa7e98ac047a44b
Reviewed-by: Robert Loehning <robert.loehning@digia.com>
Squish: Added verification to selectFromCombo()

Change-Id: I694163aeb7a588618207ec4064f93658e25e1917
Reviewed-by: Robert Loehning <robert.loehning@digia.com>