Tab title should show the title of the current pane in split view

[mboeker]

When you have multiple panes in a split view, the tab title should be for the active pane.
For example I have a tab with two panes, left side is an ssh session to server1, right side to server2. The tab title for both of those panes always only shows server1, it would be great if it showed the title of the "active" pane.

[timesnewmen]

This should be a very nice feature for the split function.