Correct the EBNF for snippets

I reviewed the parse's code and think that `${sn:-else}` and `${sn:else}` may have the same function and should share the same status，which means that  the pattern should be something like `'${' int ':-' else '}' | '${' int ':' else '}'` or not  '${' int ':-' else '}'  '${' int ':' else '}'.

fixes #35923

fixes #36045

* Fix wrong placement of 'e.g.'s in the description of `window.title` setting

* Fix the same error in configuration-editing

Fixes #35991

This reverts commit a91bad46.

Fixes #35813

Fixes #35691

Use unique grammar and scope for JavaScript react to avoid conflicts when overriding plain old javascript grammar

Fixes #35532

Fixes #35550