Reviewed-by: Roberto Raggi

'variant' has been removed from the qml grammar: d1f019567, it's now 'var' only.

Reviewed-by: Thomas Hartmann
Task-Number: BAUHAUS-536

Should have been part of 9aaf2ec8

Reviewed-by: dt
Reviewed: erikv, con

from text editor.

The Document thought it was a JS file as it doesn't have the .qml
extension.

Remove unused page from stacked widget form, move duplicated code
into utility functions, reduce state variables and string comparisons
in RssFetcher, clean out includes. Give WelcomeModeTreeWidget
uniform row height.

Use explicit DEFINE to enable additional API in node instances for testing,
not QT_BUILD_INTERNAL.

The run configuration id changed, leaving restored qmlproject without
any run configuration.

Reviewed-by: kkoehne

preferred mode.

Switching to preferred mode is solely done by the editor manager.

A flag that marks a plugin to be experimental, that should not be loaded
by default.

Both implementations are now split into two source files, based on the
base class type. They share also a commen implementation, but the class
interface looks now clean to the outside. Adopt other classes for use.

Since we use a two column model/treeview we need to prevent returning
some text data, otherwise we will see dots in the secound column. We also
need to emit pagesChanged once we init the model.

Based on the implementation done by ck, slightly modified and thus put
under the private help internal namespace.