enhancement: Change zoom slider value to be based on tile size config

[GabrielTadachi]

Description

My game tilesets are based on MV ones (48x48) instead of the default (32x32). Due to this, when I open and save configs ingame (after login), the zoom slider starts to show the real values (1, 2, or 4 * (32 / block width))

Instituto_de_Magia_Bandelugo_2025-03-21_07-42-40.mp4

Intended Use-Case

The change should be about stop showing the real zoom scale value and only show what's stored in user preferences

Duplicate Check

• This enhancement idea is not a duplicate to the best of my knowledge.