For later use in IFindFilter.

Don't highlight selection in headers, disable editing and make it a bit
bigger by default.

Allowing any length more than 2 is too slow at the moment. We'd first
need to find a way to avoid recalculating the complete list of items
for every character while the key isn't matching anything.

Now it's possible to choose between having completion popup manually,
when triggered or always.

Similar behaviour as for the QML editor. However, for now without
removing the completion box when you have typed the whole word, since it
could still be useful for automatically inserting other characters.

Task-number: QTCREATORBUG-67

Reviewed-by: Erik Verbruggen

 * Windows does not like "QObject */* name */", warning about end
   of comment when rtunning into */*.

graphics items could be destroyed after selecting something.

 * Fix "instantiated from" with leading spaces being wrongly considered
   an error.
 * Add a unit test to cover this case

This changes the colors to be a mix of red/blue and the foreground
color. If the regular text color is either of those, well...

attach to a gdb server

Fixes a regression introduced in 7862e312.

Reviewed-by: dt

QDeclarativeContextData isn't exported for a default Qt (non
-developer-build).

done by Robert