parentheses highlighting. This makes the Delete key work smoother when
the cursor is positioned behind a closing parenthesis.

Reviewed-by: Roberto Raggi

Find translation helper binaries in QT_INSTALL_BINS. QT_INSTALL_PREFIX is
/ on OS X, since it cannot have a meaningful value, unless you are
compiling Qt to work from the build dir, in which case QT_INSTALL_PREFIX
is set to this directory.

Works only with Archer, possibly gdb head.  It attaches now, sets breakpoints,
steps etc but cannot be stopped when running.

still quite some potential ...

So now you can choose not to automatically build before running.
And you can chose to automatically save all files before building.
The options are global and the default is the same as before.