61796 Improved docs for minLines in EditableText (a: text input, cla: yes, d: api docs, documentation, framework, waiting for tree to go green)

63786 Make SelectableText work better on web (a: text input, a: typography, cla: yes, framework, platform-web, waiting for tree to go green)

64516 [web] Fix and enable editable_text_test.dart (a: tests, a: text input, cla: yes, framework, platform-web, team, waiting for tree to go green)

64570 [web] Enable word boundary tests in editable_text_test.dart (a: tests, a: text input, a: typography, cla: yes, framework, platform-web, team, waiting for tree to go green)