Reviewed-by: ck

This bug manifested itself as not getting a tooltip and correct context
help for the type of the root object in a Qml file.

Do this as part of the ProjectLoadWizard

And a vague probability that it could (in the future)
save fetching the standard icon multiple times from the system.

QCompleter::popup() actually shows the popup, which is both annoying and slow.
Delay the annoyance from startup to a later point till this is fixed in
Qt.

The dependency was there for a while. No need to jump through hoops hoping
to maintain a stand-alone debugger anymore.

editor or re-used an existing one

- clearing search input focus when clicking clear icon
- re-set updated sections' models
- using GridView-based item selection
- C++ code cleanup
- Manhattan-length used for drag & drop initiation
- integrated QtCreator's filter text input
- replaced QToolButtons with a QTabBar
- fix: eliding text & corrected selector offset
- styled resources view
- updated Qml syntax

from options dialog and editor factory.

Reviewed-by: kkoehne

Reviewed-by: kh1

These icons adds visual clutter and do not really give any
added value. We should reserve icons for lines that are
known as errors or warnings as these deserve special
attention.

Conflicts:
	share/qtcreator/translations/qtcreator_ru.ts

Re-introduce FormWindowEditor as IEditor used for
Designer. Use SharedTools::WidgetHost directly
for embedding into FormEditorStack, doing the
geometry-changed handling in there as well.