"Store visibility of one or all visibility variable(s) remanently and overwrite the initial setting"
-1: do nothing
XX == 00 ... 63: store @VisibilityXX remanently.
0xa5a5: All visibility variables are stored.
When storing is finished, value is reset to -1.
Reading this variable will always return -1
"Reload visibility of one or all visibility variable(s) from remanently stored value and
overwrite the current setting"
-1: do nothing
XX == 00 ... 63: overwrite @VisibilityXX with remanently stored value.
0xa5a5: All visibility variables are restored from remanently stored values.
When overwriting is finished, value is reset to -1.
Reading will always return -1