[FIX]m.GrowingDelegate: should respect growing threshold.

- Growing Delegate should respect last growing threshold set before the
request is sent.
- Growing threshold and initial focus index should be reset in case of
setBindingContext.
- Navigation focus index should set only for initial case

BCP: 1472014848
Change-Id: I1bcd51fb9118210f764ca9cfbd538268002f07a1
[FEATURE] sap.m.Link: Added right to left support

- Added textDirection property which accepts value of type
sap.ui.core.TextDirection
- Added textAlign property which accepts value of type
sap.ui.core.TextAlign
- Renderer adds TextAlign and dir attribute to the value element with
the respective
textDirection
- Added qunit tests for the RTL support

Change-Id: I7362b7dd92fb2e8729d7ec8832134f6a3cdd21c8
Merge "[FIX]m.GrowingDelegate: should respect growing threshold."
Merge "[FEATURE] sap.m.Link: Added right to left support"