signal lists still broken for 4.6

It's conflicting too much with pasting for some, so better have the
option to just turn it off.

Reviewed-by: dt

See commit b53fbe80

This makes sure the context-specific names don't show up in the settings
dialog. Also fixed the variable names to conform better to our
standards.

Reviewed-by: con

Should still be ok on small screens though.
Suggested by Christian Hoenig.

Got disabled in a merge.

As this is how it is navigated by keyboard.

Reviewed-by: con <qtc-committer@nokia.com>

Conflicts:
	src/plugins/texteditor/basetextdocument.cpp

Missing dependency in plugins.pro, sometimes breaks multi-process build.

Introduce integrated 'Did you know' section, prevent scrollbars.

Reviewed-by: hjk <qtc-committer@nokia.com>

Instead use qmake IDE_LIBRARY_BASENAME=lib64 to set it to lib64.