CodeMirror settings – suppress "Default: [object Object]" below section when settings are changed

[firai]

Problem

When any of the settings within a CodeMirror settings section in the Settings Editor (i.e., in the CodeMirror, Notebook, Text Editor and Code Console pages), the user's settings object no longer matches the default settings object, and "Default: [object Object]" appears below the CodeMirror settings section. However, the message does not seem to be meaningful or helpful for the user, so it just adds visual noise to the settings pages, which are already quite dense.

Proposed Solution

Don't display the default when the setting schema type is object.