more minor UI cleanups

library/ui/hierarchy.factor

@@ -40,9 +40,6 @@ sequences vectors ;
     #! is the gadget itself.
     dup [ dup gadget-parent parents cons ] when ;
 
-: find-parent ( gadget quot -- ? )
-    >r parents r> find nip ;
-
 : each-parent ( gadget quot -- ? )
     #! Keep executing the quotation on higher and higher
     #! parents until it returns f.

library/ui/menus.factor

@@ -33,10 +33,3 @@ C: menu ( assoc -- gadget )
 ! While a menu is open, clicking anywhere sends the click to
 ! the menu.
 M: menu inside? ( point menu -- ? ) 2drop t ;
-
-: actionize ( obj assoc -- assoc )
-    #! Prepends an object to each cdr of the assoc list. Utility
-    #! word for constructing menu action association lists.
-    [
-        unswons >r >r unit [ car ] cons r> append r> swons
-    ] map-with ;

library/ui/panes.factor

@@ -67,7 +67,11 @@ M: pane focusable-child* ( pane -- editor )
     dup pane-output clear-incremental pane-current clear-gadget ;
 
 : pane-write-1 ( style text pane -- )
-    >r <presentation> r> pane-current add-gadget ;
+    pick empty? pick empty? and [
+        3drop
+    ] [
+        >r <presentation> r> pane-current add-gadget
+    ] ifte ;
 
 : pane-terpri ( pane -- )
     dup pane-current over pane-output add-incremental