Backed out 8 changesets (bug 1023882) for b2g mochitest-4 orange on a CLOSED TREE

Backed out changeset 501167f9e525 (bug 1023882)
Backed out changeset 811d536995cf (bug 1023882)
Backed out changeset c38a0cb1e00c (bug 1023882)
Backed out changeset 4ba2f2a98114 (bug 1023882)
Backed out changeset 42e44e1eb363 (bug 1023882)
Backed out changeset a92435f75f89 (bug 1023882)
Backed out changeset 039cfd09fa32 (bug 1023882)
Backed out changeset 05e8c4ee536d (bug 1023882)
Bug 1021874 - Check if entry is current VC position before changing caret offset. r=yzen CLOSED TREE