Having a duplicate prototype chain - once in FakeMetaObjects and once
in QmlObjectValues was unnecessary. Now FMOs don't contain references
which may allow other simplifications.

Removed duplicate info.

Reviewed-by: hjk

Task-number: QTCREATORBUG-3782

Task-number: QTCREATORBUG-3771

Task-number: QTCREATORBUG-3229
Reviewed-by: Alessandro Portale

Done-with: Leandro Melo

if the exact evalution fails (possibly because of a parser error), then
still use the cumulative evaluation to construct the project tree. only
the target information won't be updated and the code model will be left
in the dark.

todo: the errors are dumped only to the (unnumbered) "general messages"
output pane, which makes them practically invisible.

Task-number: QTCREATORBUG-3093

instead of erroring out the parse, only error out the evaluation in
exact mode. that way we can do cumulative evaluation even on broken
files.

Task-number: QTCREATORBUG-3093

it would collect global values instead.

special-casing it makes no sense, as all other values from the
project would be mismatched and thus worthless for code validation
anyway.

the node updater would check if the cumulative and exact evalutor
returned the same project type and would discard the cumulative one if
they didn't. this was pointless, as a) it would practically never happen
and b) it would be without much consequence anyway.

... otherwise oldValues equals newValues.
the signal is currently not connected anyway, but whatever.

this kinda worked because int(ReturnTrue) == int(true), but there
are more possible return values than that.

Reviewed-by: Kai Koehne

Old logic was too fragile to maintain.
Now it's  PointMixed -> PointPlain -> RangeMixed -> RangePlain.

That means createComponent etc. will now be completed.

Now using an explicit Mode (generated, imported) instead of empty
or set filename convention. Just like in Html5App.

Some things forgotten as part of commit f9e65028 since
these files are not compiled together with Qt Creator.

Fixes compile of QML Observer and QMLJSDEBUGGER-enabled QtQuick
Applications.

AbstractFormEditorTool -> AbstractLiveEditTool
LayerItem -> LiveLayerItem
SelectionIndicator -> LiveSelectionIndicator
SelectionRectangle -> LiveSelectionRectangle
SelectionTool -> LiveSelectionTool
SingleSelectionManipulator -> LiveSingleSelectionManipulator
RubberBandSelectionManipulator -> LiveRubberBandSelectionManipulator

Task-number: QTCREATORBUG-2968
Reviewed-by: Alessandro Portale

Reviewed-By: Christian Kandeler

All type information should be now available.