Log Message:
Update wagtail to 2.10.2:

2.10.2 (25.09.2020)
~~~~~~~~~~~~~~~~~~~

 * Fix: Avoid use of `icon` class name on userbar icon to prevent clashes
 with front-end styles (Karran Besen)
 * Fix: Prevent focused button labels from displaying as white on white
 (Karran Bessen)
 * Fix: Avoid showing preview button on moderation dashboard for page
 types with preview disabled (Dino Perovic)
 * Fix: Prevent oversized buttons in moderation dashboard panel (Dan
 Braghis)
 * Fix: `create_log_entries_from_revisions` now handles revisions that
 cannot be restored due to foreign key constraints (Matt Westcott)

2.10.1 (26.08.2020)
~~~~~~~~~~~~~~~~~~~

 * Fix: Prevent `create_log_entries_from_revisions` command from failing
 when page model classes are missing (Dan Braghis)
 * Fix: Prevent page audit log views from failing for user models without
 a `username` field (Vyacheslav Matyukhin)
 * Fix: Fix icon alignment on menu items (Coen van der Kamp)
 * Fix: Page editor header bar now correctly shows 'Published' or 'Draft'
 status when no revisions exist (Matt Westcott)
 * Fix: Prevent page editor from failing when `USE_TZ` is false (Matt
 Westcott)
 * Fix: Ensure whitespace between block-level elements is preserved when
 stripping tags from rich text for search indexing (Matt Westcott)