fix: init icon size is not normal due to missing null check

[shenlebantongying]

fix #1789 (comment)

[sonarcloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[KonstantinDjairo]

related to the config code, i think there's a issue in the windows platform

it doesn't respect whether the checkbox is marked or not, causing it to get in front of other windows.
could you please handle that checkbox a bit more gently ? i dont know what we can do in c++ to ensure that the value is going to be respected or whether we can confirm if it's saved in the config file.

interestingly this error has only occurred in windows, in every other OS it's ok