Duplicate PasswordInput classes

[richardfearn]

There seem to be two copies of this:

• org.csstudio.security.PasswordInput in org.csstudio.security
• org.csstudio.startuphelper.PasswordInput in org.csstudio.startup.helper

[kasemir]

.. and there may be a reason for that.
During startup, where we want to offer a workspace selection dialog, you need to be very careful about loading code from other plugins.
Access other plugin, its activator runs, which might look at preferences, and to load preferences, Eclipse needs a workspace, so it activates some default one ... and then you can no longer select a workspace.
That might be the reason why the password input was put into the startup plugin, because loading it from the security plugin wasn't an option.
If you want to change that, make sure you test with an exported product if the workspace selection still works.