Added unit tests for convertSelectionsToLines() and doMultipleEdits()
Merge branch 'cmv4' into nj/cmv4-helper-unit-tests
Move doMultipleEdits() to Document
Merge from cmv4
Code review fixes
Merge pull request #6964 from adobe/nj/cmv4-helper-unit-tests

[cmv4] Added unit tests for convertSelectionsToLines() and doMultipleEdits()