Changes

Amiga: Copy BBox in case it is modified This replicates the
functionality of SPACE_RenderBox Also fix a potential memory leak

AmigaOS3: Handle IBox being NULL

AmigaOS3: Pass the address of the pointer to SPACE_AreaBox Revert
previous change

CI: Update CodeQL workflow action to v3

CI: monkey: Install python3-pyasyncore package

desktop: textarea: Unsigned difference expression compared to zero
Squash CodeQL `cpp/unsigned-difference-expression-compared-zero` issue.
    This rule finds relational comparisons between the result of
   an unsigned subtraction and the value `0`. Such comparisons
   are likely to be wrong as the value of an unsigned subtraction
   can never be negative. So the relational comparison ends up
   checking whether the result of the subtraction is equal to 0.
   This is probably not what the programmer intended.