qdoc: Don't try to output from index nodes

When qdoc traverses its internal node tree to generate
either the html docs or the help file, it no longer
traverses nodes that were added to the tree as the result
of reading an index file.

Task-number: QTBUG-32622
Change-Id: Iac63ac2ce177b15b85a2aa73850c45891cbbc624
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>
Reintroduce -geometry command line argument for X11/XCB.

Add parsing for the window geometry specification to
QGuiApplicationPrivate. Enable the argument under a different
name for the other platforms as well.

Task-number: QTBUG-27349
Change-Id: I973b2c69f5172f7d0bc983b8ba4b0d164649ef02
Reviewed-by: David Faure <david.faure@kdab.com>
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>
XCB: Readd support for -name command line argument.

Task-number: QTBUG-27349

Change-Id: I85390942927cd1c54f76fd7ddc0f3487c7205b57
Reviewed-by: David Faure <david.faure@kdab.com>
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>