GeneratePress 3.5.0

Feature: Add support for more core block options
Feature: Add support for GPP Font Library in the Customizer
Fix: Underlined buttons in the editor
Tweak: Add minimal header/footer templates for future GPP site editor
Tweak: Allow bottom margin value in custom typography elements
Accessibility: Add role to back to top button
Accessibility: Use h2 for comments title
Accessibility: Add aria-controls to menu dropdowns
Accessibility: Add aria-label to menu dropdown toggles
Accessibility: Add proper roles to menu dropdown toggles
Accessibility: Allow spacebar to open menu dropdowns