Merge changes from origin/7.0

1a6200e Merge #6880 test from 6.8; fix itself is not needed in Vaadin 7
67696f3 SQLContainer.indexOfId() also searches backwards (#11849, #10376)
611e5f9 Test for #11267 adapted from 6.8.
609acd1 Fixed table height rendering in Android 2.3 #11331
63dd611 Centers VOverlays in visual viewport on iOS, Android, fixes #11614
5a33d7d Test for #11775
0c8edf1 Avoid marking AbstractField dirty in primitive getters (#11201)

Change-Id: I7437e0b249c1a95372d6f349e9d6336fb85f08a4

diff --cc client/src/com/vaadin/client/BrowserInfo.java
Simple merge

diff --cc server/src/com/vaadin/data/util/sqlcontainer/SQLContainer.java
Simple merge

diff --cc server/src/com/vaadin/ui/AbstractField.java
Simple merge