In reordering the parameters, I stick the following principle: place parameters from least changing to most changing. Thus, we have config and bot right from the beginning, next a dialogue with a possible payload, and next updates such as messages, inline queries, etc. This principle is used in languages with a native support for currying, although in Rust people appear to order parameters arbitrarily, so this commit is mostly for the sake of consistency.
Former-commit-id: 5922984f6c
This helps with consistency -- every setting is changed in builder.
Also `Self -> Self` function sometimes plays more nicely with borrowck.
Former-commit-id: dd4af30727
