fix 2 issues after merge
Update CodeMirror to the latest.
Merge pull request #8994 from adobe/rlim/codemirror-for-44

Update CodeMirror to the latest.
Merge pull request #8990 from adobe/jeff/splitview-fixes

Fix 2 issues in DocumentManager Deprecated APIs
progress
Merge branch 'master' into jeff/splitview-ui-treatment
basic resize and edge cases
much auto-resize second pane with percentages
resizable panes