Unify names to QmlProjectApplicationWizard & QmlProjectImportWizard

Used, for instance, in Rotation.axis or Rotation.origin.

We don't support manipulating them right now.

Ideally all the items should probably appear on this page, but some
grayed out - disabled.

Separation is taken from the Qml Elements documentation, but
some names have been shortened:

Basic Visual Elements -> Basic
Basic Interaction Items -> Interaction

- Prepare usage of 'make sis' target for GnuPoc.
- Change the package names to '_unsigned.sis', '.sis'
  instead of using '.sisx' for signed, adding accessors
  to S60DeviceRunconfiguration.
- Determine the local executable file name from the
  package template for GnuPoc (as it is no longer
  located under the SDK tree).

This now errors for:
anchors.undefinedAnchor: foo
x.undefinedAnchor

Also fixing bunch of failures, still some to go though ...

Move code to locate gcce from S60Manager to CCE toolchain and make it
handle empty GCCE-root's correctly (locate compiler in path and
warn if none found). Set up environment correctly.

Reviewed-by: hjk

- Autodetect SDK by environment variable EPOCROOT and qt directory
below.
- Environment::appendOrSet/prependOrSet: Avoid duplicate entries
- Rename toolchain enumeration value
- Adapt S60ToolChainMixin to new GnuPoc setup, provide routines for
  all required variables.
- RVCTToolChain: Make RVCT detection smarter (Check for RVCT<v1><v2>BIN
  variable). Set all required variables in case of RVCTToolChain/GnuPoc
- QtVersionManager: Detect toolchain and Qt version properly, make S60
  device run config accept toolchain.
- Modify S60DeviceRunControl to execute 'make sis'
- Modify S60Devices::detectQt...() to check for Qt installed into SDK
  first and symlink as fallback.

 when not set to true in the .user-file.

 * Remove default Qt version from list of available versions

Brace for impact...

Happens e.g. in gdb sources itself: cp_canonicalize_string in cp-support.c

Note: If you are compiling with 4.6 but running against 4.7 then this
will result in a slightly buggy line edit.
Reviewed-by: Friedemann Kleint <qtc-committer@nokia.com>

And rename it to updateRunActions() again, since that function is
only called if the run actions actually change.

And port the Qt4ProjectManager to use that API for synchronization
between editors and the .pro file tree.

Reviewed-By: con

We used to fail back to the old format if the .qmlproject file
was invalid. Anyhow, this lead to weird effects ... better disable
it explicitly.

That no warning is shown right now when loading an invalid qmlproject
file is a bug in coreplugin.

task-number: QTCREATORBUG-611