Agata Cacko authored Jun 24, 2019 and Raghavendra Kamath committed Jun 24, 2019

Before this commit, the recommended method was to use 'WebIDE' option.
For our less technical contributors it could be complicated to use:
* it "allows" for changes on official repo and only throws errors
   when the user wants to commit them,
* by default, it commits changes on master of the fork
   instead of creating new branch, which makes it harder
   to merge later in some circumstances,
* it doesn't create merge requests automatically.
After this commit, the suggested method is to use 'Edit' mode,
which doesn't have those issues (although doesn't allow
editing multiple files at once).