entry: Use correct state when computing icon padding
range: Setting stepper visibility requires a restyle
gtkrange: Fix copy/paste error

When factoring out a function in
b88584e7bae9bacbda8bd0d9868cbe50eb8e218d I forgot to adapt these values.
range: Query slider position instead of updating it

We're updating it later in the function, there's no need to do it here.
range: Remove unnecessary argument

It's always the same value passed in, so just use that value directly.
textbtree: Remove unneeded check