Issue #1363112 by mparker17, mgifford, tlattimore, Jacine, dcmouyard, bowersox, ry5n, ahdiaz: Simplify names of 'element-x' helper classes.

Issue #1973456 by echoz: Fixed .element-invisible on element at right causes horizontal scrollbar on desktop or right gap on phone on webkit browsers.

Issue #1847084 by jessebeach, trawekp, LewisNyman, nod_, tarekdj: Fixed Vertical toolbar doesn't work with overlay (measure/track displacing elements better + provide change events for them).

Issue #1913958 by hass, YesCT: Fixed Bartik theme: Don't change capitalization of translatable strings with CSS.

Issue #1168246 by sun, mgifford, Manuel Garcia, mbrett5062, ry5n, Everett Zufelt, nod_, aspilicious, deviantintegral, tim.plunkett: Freedom For Fieldsets! Long Live The DETAILS.

Issue #1292470 by sun, tim.plunkett, Berdir, moshe weitzman, pcambra, Niklas Fiekas, andypost et al: Convert user pictures to Image Field.

Issue #1238484 by mrfelton, ry5n, aspilicious, Bojhan, Xano, nod_, rootatwc, effulgentsia, chx, sun: Ability to mark the form buttons to be of a specific type (so that they can be styled differently).

Issue #1826574 by dawehner, dead_arm, tim.plunkett: Move Views theme-specific CSS to their respective themes.

Issue #1608878 by jessebeach, tim.plunkett, dead_arm, nod_, sun, effulgentsia, Everett Zufelt, geerlingguy: Added CTools dropbutton to core.

Issue #1276908 by jessebeach, nod_, moshe weitzman, lewisnyman, webchick: Fixed Administrative tables are too wide for smaller screens.

- Patch #1192044 by mjohnq3, Manuel Garcia, effulgentsia, sun, JohnAlbin, jessebeach, moshe weitzman: Convert Bartik's layout to mobile-first and responsive.

Issue #1174640 by Niklas Fiekas, aspilicious, ericduran, cosmicdreams, amateescu, tim.plunkett: Added new HTML5 FAPI element: number.

- Patch #1216976 by cosmicdreams, DyanneNova, aspilicious, rupl, Jacine, mortendk, dcmouyard: clean up the CSS for Comment module.

Issue #1216978 by cosmicdreams, jyve, mortendk, jessebeach, Jacine, aspilicious: Clean up CSS for Contextual module