add detail on what the problem is in todo

TODO

@@ -10,6 +10,16 @@ masks r just made to bare minimum work
 
 move span lengths to the children themselves
 
+retained mode is broken
+    problematic path:
+        resize target gets set to something above an aligned
+        aligned finds size 0 for example on og draw
+        element gets size > 0 and redraws the resize target
+        target doesn't change aligned region, so it gets skipped
+        og gets redrawn, but aligned originally set region to 0 and didn't get updated
+    so should probably just store direct parents and go up that way
+        but need to be careful to not break the chain
+
 scaling
     could be just a simple scaling factor that multiplies abs
     and need to ensure text uses raw abs and not scaled abs