+Adding many lines makes it terribly slow.
+
+Printing produces empty pages only.
+
+Formatting of first text in message in M is broken.
+Large images in last line don't get displayed properly.
+Taking last line's height as default for next is rubbish,
+use "default height" and adjust as necessary.
+
+Selections:
+ - moving in negative direction doesn't work
+ - selection state not properly reset, only works once
+ - selecting non-text objects is strange
+
+wxllist::GetSize() requires extra Layout() call, which should not be
+necessary. Find out why this is so.
+YES, it is necessary, because the normal drawing only happens within
+the visible window.
+I must find a way to re-Layout() objects. This is only required after
+their sizes change:
+- Just mark them as dirty:
+ - mark current line as dirty when editing it (so width gets recalculated)
+ - mark all following lines as dirty when changing font settings
+ - Let Layout() work only on the dirty lines.
+ !!! GOOD: this can also be used to recalculate the wxLayoutObjectCmds'
+ fonts! :-)
+