Use GeneratePress customiser options instead of re-implementing them

[marekdedic]

Currently, the theme relies on GeneratePress premium for some of its functionality while at the same time it re-implements some of the settings.

We need to decide, itf we want to built on top of GeneratePress Free or Premium - @kalich5?

We should use the GeneratePress customizer options where we can and add to them, not do our stuff separately

[kalich5]

Pro plnou funkčnost bude lepší GP Premium i u basic šablony