QQuickTextInput aligment to follow input method on neutral content

Earlier input method was followed only on empty editor. This made
inputting one space character with arabic to be visualized left to
right.

As related change arabic numbers are aligned right even though the
flow goes left to right.

Change-Id: I36448949569f6290faad69de14df424575d8b97e
Reviewed-by: Joona Petrell <joona.t.petrell@nokia.com>