[FIX] ListBox / DropdownBox: scrollTop issue (zoom != 100% in Chrome)

Chrome returns a floating value when reading the scrollTop value in some
cases (with different zoom levels).
Added rounding when setting "scrollTop" property (as it is of type int)

BCP: 1482025218
Change-Id: Ie8844affbade5124a87afc85d045670f61a75007
(cherry picked from commit a031490d51e9118fd6aa0215891659cdf86516c9)
CR-Id: 012003146900009528392014
[FIX] sap.m.Button: text is not vertically aligned - fix for HCB theme

- button text is not centered vertically in cozy mode

Change-Id: I5cff7d785c4c6c46a089f54a821fc793bc92370f
BCP: 1482006601
CR-Id: 012006153200014991572014
Merge "[FIX] ListBox / DropdownBox: scrollTop issue (zoom != 100% in Chrome)" into rel-1.26