many changes related to #1192:

- use CSS contain wherever possible to reduce subtrees of forced reflows
- reduced dependency between note and note_contents updates which will reduce number of updates to components
- optimization of "many rows" querying

src/services/note_revisions.js

@@ -34,7 +34,6 @@ function createNoteRevision(note) {
         noteId: note.noteId,
         // title and text should be decrypted now
         title: note.title,
-        contentLength: -1, // will be updated in .setContent()
         type: note.type,
         mime: note.mime,
         isProtected: false, // will be fixed in the protectNoteRevisions() call