comdlg32: Delay setting the initial size of resizable file dialog until the CDN_INITDONE notification has been processed.

comctl32/listview: Setting item text to callback stub value already having it raises item-change notifications.

Use same new text comparison rules for both items and subitems.
Based on patch by Stefan Stranz.

comctl32/listview: Don't offset item box to item position on LVS_EX_FULLROWSELECT if item isn't in leftmost column.