Clean icore.h.

We were handling it ourselves, now we let saveGeometry and saveState do
its job. This also takes care of making the geometry valid for offscreen
saved states.

Task-number: QTCREATORBUG-1689

- Unexport Core::Internal::MainWindow and remove its includes.
- Move RssFetcher from Core::Internal to Core.
- Unexport CopyTaskHandler.
- Move TextEditor's completion support and Refactor Overlay
  helper classes from TextEditor::Internal to TextEditor as they
  are exported.
- Move internal BaseTextBlockSelection into private header.
- Unexport TextEditorOverlay as they are not used.

qtLibraryTarget is only defined if used with TEMPLATE=lib, which makes
it fail in pri files that are used for app pro files. The tests still
don't run because of run time linking issues.

Reviewed-by: dt
Task-number: QTCREATORBUG-2947

TextEditor will now recognize an UTF-8 BOM.

A setting to determine what to do on saving has been added as well - the
options are "Always Add", "Keep Already Present" and (mostly for
completeness) "Always Delete".
Note: if encoding is "System", "Always Add" doesn't work, because there
is no API to know what the System encoding is.

Task-number: QTCREATORBUG-1857

Merge-request: 2180
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>

helps lupdate

Share the (user)settings object between plugin manager and Qt Creator
core.

Written-by: Tobias Hunger

Completely hide the sidebar if no navigation widgets are
available at all.

* Editor manager should abort closing core, if there's a ICoreListener
that aborts closing of a editor.
* Don't save state of temporary editors, and don't save them as open in
  a splitter. So restoring the editor manager state won't try to reopen
  temporary editors.

Task-number: QTCREATORBUG-2845
Task-number: QTCREATORBUG-2841
Reviewed-by: Tobias Hunger

Stop navigationwidget from going haywire when faced with old
configuration data. This issue could lead to different effects:
 * A crash
 * Creator not being able to exit anymore
 * The sidebar being messed up

Task-number: QTCREATORBUG-2780
Reviewed-by: con

We accessed the m_applied member after the dialog already was deleted.

Task-number: QTCREATORBUG-2844
Reviewed-by: Friedemann Kleint

The debugger plugin opens an editor in this case, leading to fakevim and
cppeditor crashing.
This commit doesn't fix the problem's source, but adds safeguards that
are sensible anyhow: FakeVim should not register with editors during
shutdown, and CppEditor should not unconditionally assume an existing
editor manager in the destructor.

Reviewed-by: Friedemann Kleint

We actually only want to change the tool tip.

Reviewed-by: Thorbjørn Lindeijer

Confusion between native and internal path representation (i.e.
backslashes). File names should always be "portable" internally.

Reviewed-by: Robert Loehning

When choosing an example from the welcome screen and the user
cancels loading the project:
 * Do not switch to edit mode
 * Do not load main.cpp
 * Do not pop up help

Task-number: QTCREATORBUG-2774
Reviewed-by: Daniel Molkentin

  - the Nokia Qt SDK UpdateInfo plugin progress should stay in the
    progress view till the user clicks on it
  - now the futureprogress knows the difference between:
    KeepOnFinishTillUserInteraction and KeepOnFinish

Reviewed-by: con

Since bearer mangement uses network manager, the bearer plugin has to
use dbus to get the network configuration. Due to a bug in dbus 1.3 this
can lead to creator beeing blocked for up to 30 seconds on startup.

Task-Nr: QTCREATORBUG-2718

Reviewed-By: con

Task-Nr: QTCREATORBUG-2582

Moving the logic out of BaseTextDocument for use at other places.

Task-number: QTCREATORBUG-2694
Reviewed-by: ck

Fix ignoring temporary files when saving a session. This could crash
when opening a session and saving it again if not all open editors
were actually shown to the user.

Do not save temporary editors in the session. Chances are high
that files opened in those editors are not around when the
session is reopened.

Task-number: QTCREATORBUG-2422

The action manager was reading the settings before the navigation panels
had their commands registered.

Task-number: QTCREATORBUG-2005
Reviewed-by: hjk

Reviewed-by: Leena Miettinen

isEmpty is the wrong thing to check when setting the default shortcut. In addition,
registering commands should not set their shortcut automatically (that
should be defined solely by the default shortcut and reading the
settings, which is done later).

Otherwise we can't sensibly declare slots with a matching parameter.

When switching to a editor containing a temporary file do not
update the filemanager, even when sync to editor is enabled.

Task-number: QTCREATORBUG-2605
Reviewed-by: Thorbjorn Lindeijer

Symptom of file name slashification breakage.

Reviewed-by: dt
Task-number: QTCREATORBUG-2535

Fix breakage introduced by 65e95c3a,
introducing a writeAccess attribute not properly initialized
in the default CT. The GeneratedFile::CustomGeneratorAttribute
exists for that purpose.

Reviewed-by: Tobias Hunger <tobias.hunger@nokia.com>
Task-number: QTCREATORBUG-2518

Should have been done earlier. 2.1.80 was burned in the pre-2.1.0->2.0.1
days, and we'd like to have odd subminor for 'working' and even subminor
numbers for pure cherry-picking release branches anyway.