[FIX] sap.m.Link: trigger href navigation also with SPACE key

When Space is pressed, disarm the event and create a new Click event
instead, which the browser will then handle appropriately.

CSS: 0120031469 0000738362 2014
Change-Id: Id7d02e28980e7b672e7041405d1d126aac163833
Merge "[FIX] sap.m.Link: trigger href navigation also with SPACE key"