In breadcrumb's branch selector the master's plan should display itself as something different than "default"

If we create a plan along with plan-branches, then in breadcrumb selector (see attachment) we will see something like:

• default <-- hardcoded text (branch.master.title)
• branch 1 name
• branch 2 name
• branch 3 name
  etc etc

Thing is that the 'default' name is not intuitive for some use-cases. For example imagine a plan that tests a plugin for jira. Each branch in the plugin repository corresponds with different jira version (trunk -> 5.x, 4.x, 3.x). Lets assume the trunk of the repository is set up to work against jira 5.x. So, the branches selector list will look in this example like:

• default
• 4.x
• 3.x

This is not clear at the first glance what that 'default' is. The more intuitive list would look like:

• 5.x (let's assume the master plan name is "5.x")
• 4.x
• 3.x

I'm not 100% sure what should be displayed instead of the hardcoded "default" but using the master's plan name could be a good shot for the beginning (as it is similarly displayed in Branch Integration selectboxes: "default: planName"; "branch1" ; "branch2").