Rich Text Editor:Rich Text Editor Sizing

Build 7258 on users/vivin/editor-ui-api
1200px
Reviewing disabled
Baseline History
Build 72589a12f91
Current build. There are unaccepted changes, so build 7106 is still the baseline.
Build 71060b58903 current baseline
Accepted by vikisekarNI.
Commenting is disabled because there's a newer build on this branch