FMSLogo Code

Refactoring: Rewrite litem() to use get_int() instead of get_integer().
This is more direct and requires less code.

Extend ITEMTEST.BADINPUT.RECOVERABLE to include chained recovery.
This tests that ITEM restarts processing each input that :erract provides, regardless of what's bad about it.

Refactor the "accept ownership of erract" tests to use SIMPLEREPORTTESTNOCATCH.
This removes some duplicated code.

Refactoring: Simplify lbitsave() by using get_int() instead of integer_arg() and getint().

Refactoring: Simplify lgifsave() by advancing args to the next node as arguments are read instead of having long chains of cdr.
This makes the code shorter and more readable.

Refactoring: Simplify lgifsave() by using get_int() instead of integer_arg() and getint().

Update the expected test log with the output from test cases that were recently added.

Rework int_arg() so that it doesn't modify the arguments list.
This is part of a larger effort to simplify the code base by reducing the number of side effects.

Rename CLogoCodeCtrl::Replace to CLogoCodeCtrl::ReplaceText and make it non-virtual to fix a -Woverloaded-virtual warning.

Add missing "const" qualifier to CanCut and CanCopy so that they override the virtual functions in wxTextCtrl.
This required a little rework to a helper function IsTextSelected() to make it const, as well.
This fixes two -Woverloaded-virtual warnings in gcc.