Adds config option to disable sync progress printing

[luca-moser]

Description

Adds an option to disable the printing of progress information to the console about synchronization. This is useful for Dyrell who's spamming milestones in a fast fashion, where however the printing of the progress bar slows down that process too much for generating DBs.

Type of change

• Enhancement (a non-breaking change which adds functionality)

Checklist:

• My code follows the style guidelines for this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[DyrellC]

Looks great! Thanks this should make it much easier for me to make DB's for tests now.