Respect fixed pitch request when font family is not available

In particular, if you have a <pre> tag in your HTML, this will
become a QFont with family "Courier New" and fixedPitch==true.
On Android, there's no "Courier New" font, and since the
style hint is AnyStyle, we will just return Roboto, which is
a proportional font.

Note that this exactly matches the condition when fetching the
fallback families for the font in the loadEngine() function,
which was introduced by 06568ff89c48dee8aab278b8b0538c331aa84595
in Qt 4.

[ChangeLog][Text] Respect QFont::fixedPitch() for fallbacks
when font family cannot be matched.

Task-number: QTBUG-36083
Change-Id: I64787c547dc492b9dd3c49f1edf0d9626d198260
Reviewed-by: Jørgen Lind <jorgen.lind@digia.com>
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
QTextLayout: Fix cursor position calculation for BiDi text

Due excess 'break' in loop, function xToCursor() with "CursorOnCharacter" option
for BiDI text returns wrong cursor position (start glyph position) all time.

Task-number: QTBUG-38846
Change-Id: Iba6671905e0785da6f343db19d6c3bb3e2cf5e8a
Reviewed-by: Andrey Volykhin <andrey.volykhin@lge.com>
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>