What are my options for resizing docked panes when the form is resizing?

Currently when the form is reduced in height a fixed pane docked to the bottom will rise past the top of the active form area (the parent container) sliding over the UltraWinToolbar and disappear under the title bar. It looks very goofy.  Users find this to be very confusing. 

I'd prefer to start resizing the docked pane once it reaches the top of the active form area to stay within the active area.  An even better solution would be to resize the docked pane proportionately with the parent container to keep a specified % of the total height available.  

Is there a property I'm missing?  I'd do the math on the form resize event, but which height properties reflect the current resizing height for the panes?

BTW: If you have a status bar at the bottom, it looks really bizarre as you shrink the form height way down - the docked pane floats with an invisible border around it.  I'm easily entertained...