Bug fixes

#2973383: Cascading rename options by mikeytown2, ron_s

Issues included in this release:

#3124517: $(...).drupalSetSummary is not defined on drupal/core by Tom Konda
#3119033: Update tests to define defaultTheme by Chris Burge

Issues included in this release:

#3124517: $(...).drupalSetSummary is not defined on drupal/core by Tom Konda

• Issue #3135469 by remcoh, itamair: Added settings to define Tooltip in GeofieldGoogleMapFormatter
• Issue #3136305 by andycarlberg: Option to lazy-load maps on scroll
• Issue #3129716 by ChuckSimply: Zoom Finer is not a valid number
• EcmaScript6 way to define js variables (let instead of var)

25421dd (HEAD -> 8.x-1.x, origin/HEAD, origin/8.x-1.x) Adding newline to meet PHPCS checks.
7cb84c7 Issue #3074238 by attiks, Barrett: Move config form to be part of maintenance mode form
3f12513 Issue #3074238 by attiks, Barrett: Move config form to be part of maintenance mode form
f4fc7b0 Issue #3137280 by pradeepjha, Barrett: Link to configuration form from module listing in Extend menu
30c4cbf Adding @file comment and hook_help implementation.
f038bbc Issue #3129829 by mo_farhaz: Drupal 9 readiness