Summary:
Fixes T3510
Fixes T3509
Fixes T3508
Fixes T3549
Extracted clipboard service
Remove unused style prop
Begin extracting quoted text from composer. Spec for clipboard service
Fix contenteditable specs
Begin to extract floating toolbar
Extract out DOMUtils and further extract floating toolbar
Further extracting domutils and floating toolbar
composer floating toolbar extracted
Fixes to hover and link states
Collapse adjacent ul lists
Fix outdent when deleting on a bulleted list
Fix bullet controls
Fixes to list creation and deletion
Add underline keyboard shortcut
Test Plan: manual :(
Reviewers: dillon, bengotow
Reviewed By: bengotow
Maniphest Tasks: T3508, T3509, T3510, T3549
Differential Revision: https://phab.nylas.com/D2036
