Choose plugins and set defaults

I would like be able to do two things in regard to the Destinations function. First, I would like to be able to set which options appear in my dynamic context menu. Secondly, I would like to be able to override those choices by setting a default destination – sometimes I’m doing rapid screen grabs and I know I want all of them to just automatically be saved to a default location and default naming convention. Over times, in general usage, I want to be able to choose among 5-8 options, but I don’t want to see those destinations I will never choose such as Flickr or Picasso. In the Destination tab (see attached), have these checkboxes ENABLE which plugins are shown on the context menu and below it, have 2 radio buttons (mutually exclusive choices) which are DYNAMIC CONTEXT MENU or DEFAULT (which utilizes a drop down menu populated with the enabled plugins).