6 - menu - accel not displayed in preview
10 - replace object with another, keeping children
12 + write tmp file for current dialog/panel/etc.
16 ? select same notebook pages after update
18 - put some default values in tree ctrl etc.
20 - special (fast) update for some values: pos/size, value/content, sizeritem
21 stuff (?), well, as much as possible
23 - highlighting with better method
25 - import XRC/WXR files
27 + disable some window creation when it's not valid
29 - check for memory leaks from wx objects