Issue #1653026 by damiankloip, alexpott, sun, tim.plunkett, dawehner, mtift: Fixed All configuration values are stored as strings.

Issue #2058499 by mtift, BarisW: Added Combine Configuration Management menu items into one main menu item.

Issue #2074037 by Wim Leers, effulgentsia: Add drupalPostUrl() — drupalPost()/drupalPostAjax() are for forms only, D8 JS performs non-form HTTP requests.

Issue #1754246 by webflo, swentel, penyaskito, andypost, alexpott, YesCT, dagmar: Languages should be configuration entities.

Issue #1998576 by beejeebus, alexpott, swentel: Make the config import process use full config trees again.

Issue #1890784 by alexpott, YesCT, heyrocker, tim.plunkett, EllaTheHarpy, beejeebus: Refactor configuration import and sync functions.

Issue #1947814 by vijaycs85, Gábor Hojtsy, tim.plunkett: Fixed New config entities often save as langcode: und incorrectly.

Issue #1821548 by heyrocker, swentel, Dean Reilly, dawehner, alexpott, vijaycs85, jhedstrom, adamdicarlo: Add a 'diff' of some kind to the CMI UI.

Issue #1892662 by alberto56, iaha, swentel: Added Don't show 'Import all' button if there is nothing to import.

Issue #1826602 by damiankloip, xjm, sun, dawehner, EclipseGc: Allow all configuration entities to be enabled/disabled.

Issue #1697256 by heyrocker, alexpott, sun, xjm, webchick: Create a UI for importing new configuration.

This reverts commit 81666e2b. Sorry, did NOT mean to push that; was testing the CMI UI patch.