Widget Button Target options, Page Selector, External URL or

Hi All,

I have a fully functional widget with a Call to action Button that currently allows the content editor to select / define a single target link.

The target currently can be:

- a page using the page selector

- and I have managed to also expose the option of defining an external URL as well (But this gets cleared on save) 

So problems are:

1) External URL (AllowExternalPagesSelection="True") is defined but does not save the value entered and clears on save? How can I stop this, looks like a historical bug that should be fixed?

2) is there a Media Picker option to be also made available via the <sf:PageSelector /> control within  the designer? 

 So my goal is to have a single control within the designer that the content editor can simply choose either a single page, define a single external URL path or select a single media item form the media library.

Is this possible and if so any hints or direction would be appreciated.