New DOM event forwarded:
protobuf mode: Newly added.
Fix problem where
findMarks sometimes failed to find multi-line marks.
Fix crash that showed up when atomic ranges and bidi text were combined.
show-hint addon: Completion widgets no longer close when the line indented or dedented.
merge addon: Fix bug when merging chunks at the end of the file.
simplescrollbars addon: Fix invalid state when deleting at end of document.
clike mode: No longer gets confused when a comment starts after an operator.
markdown mode: Now supports CommonMark-style flexible list indentation.
dylan mode: Several improvements and fixes.