When applying fallback fonts to characters that are joined by
ZWJ or ZWNJ, we also have to set the same font for the control
characters, otherwise we will split the text and the necessary
shaping will not take place. This was reported for emojis, but
will probably also happen for Indic scripts where joiners are
used predominately.
[ChangeLog][QtGui][Text] Fixed ZWJ and ZWNJ control characters
when fallback fonts are in use.
Task-number: QTBUG-65519
Change-Id: Ia37233f3319b95af68ae6053c29997eac65448e0
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
02557c07da