attempt to make gfx2 screen mode 0 cleanup more robust on real hardware

compiler/res/prog8lib/cx16/gfx2.p8

@@ -84,7 +84,9 @@ gfx2 {
             else -> {
                 ; back to default text mode and colors
                 cx16.VERA_CTRL = %10000000      ; reset VERA and palette
-                c64.CINT()      ; back to text mode
+                c64.IOINIT()
+                c64.RESTOR()
+                c64.CINT()
                 width = 0
                 height = 0
                 bpp = 0

docs/source/todo.rst

@@ -3,6 +3,8 @@ TODO
 
 For next release
 ^^^^^^^^^^^^^^^^
+- teach the directory routines in diskio about entry type DIR (directory)
+- make diskio.list_files not use an internal buffer itself but change names_ptr meaning to user supplied buffer.
 - ir/vm: allow label in block scope (correct order of block nodes!)
 - regression test the various projects
 - attempt to fix the expression codegen bug with reused temp vars (github #89)