Password box

Continuing separating patchset:
This introduces PasswordBox component with cpaslock indicator on left.
I modified circles, maldives and elarun themes. They have same warning icon for now, maybe we can change them, or make it common?

Maui theme is unchanged because:
+ there is a problem with tooltip(however I added an option to completely disable it, so we can do that) 
+ It requires changes to PictureBox component - changing textbox to passwordbox - and passing passwordbox's img property, so we can access it in theme. That doesn't seems right to me.

So for maui we can:
- Use PasswordBox and pass image to it
- Make different indicator for maui
- Leave it as is