Some codebox inconsistent behavior

[A-ri-eL]

Hi all.

~$ lsb_release -a
Distributor ID: Debian
Description:    Debian GNU/Linux 12 (bookworm)
Release:        12
Codename:       bookworm

~$ cherrytree --version
[...] [che] [debug] /home/$USER/.config/cherrytree/config.cfg parsed
CherryTree 1.1.3

I've noticed the following undesired behavior about codeboxes in CT:

• When we create a code box, the cursor is already in there blinking; but we still have to click inside it to be able to set its height/width.

• The codebox doesn't retain its specified size across app upgrades; some get a little shorter either in height or width.

• The search process misses some results when the target string is mentioned in some codebox (Somewhat similar to #2469)

Note: In all cases using the same configuration file.