Local override of PropertiesDialog. [0]

This should be removed upon Unidata accepting pull request 78:

https://github.com/Unidata/IDV/pull/78
Fix typo in Layout Model Properties dialog. [0]

Here’s how to replicate the typo:

1. In a display window, click Tools>Layout Model Editor.

2. Click and drag to select the components of the current layout model.

3. Go to Edit>Set properties on selected.

The dialog title should contain "Serlected" rather than "Selected".

This override should be removed upon Unidata accepting pull request 78:

https://github.com/Unidata/IDV/pull/78