Issue #2623568 by yanniboi, claudiu.cristea, himanshugautam, anil280988, sidharthap, Sagar Ramgade, dawehner, tstoeckler: Config schema of argument_default plugins is incorrect

Issue #2623568 by yanniboi, claudiu.cristea, himanshugautam, anil280988, sidharthap, Sagar Ramgade: Config schema of argument_default plugins is incorrect

Issue #2090937 by darketaine, thpoul, Wim Leers, ironkiat, kostyashupenko, himanshugautam, Cottser, davidhernandez, Reinmar, Bojhan, tic2000, LewisNyman, emma.maria: Seven theme: style CKEditor-native dialogs to match Drupal-native dialogs

Issue #2702835 by ztl8702, pjonckiere, himanshugautam, dpovshed, mpdonadio: Update Doxygen for \Drupal\Component\DateTimePlus

Issue #2697909 by pguillard, himanshugautam, snehi, aburrows, jhodgdon: Fix "login (noun/adjective)" vs. "log in (verb)" in comments (and logout/log out)

Issue #2578995 by pguillard, jhodgdon, r_sharma08, ifrik, snehi, Manjit.Singh, himanshugautam, yoroy, xjm: Update the link descriptions on the Configuration page for the system module