Qt Quick Controls 2 was named that way because it was a follow-up to
Qt Quick Controls 1.x. Now that Qt Quick Controls 1 is no longer
supported, we don't need to have "2" in the name. Work on this was
already started for the documentation in
1abdfe5d5a052f2298b7bf657513dfa7e0c66a56.

By doing this renaming a few weeks before feature freeze, it won't
affect the release but still results in as little time possible spent
manually fixing conflicts in cherry-picks from non-LTS releases as a
result of the renaming.

This patch does the following:

- Renames directories.
- Adapts CMakeLists.txt and other files to account for the new paths.

A follow-up patch will handle documentation.

It does not touch library names or other user-facing stuff, as that
will have to be done in Qt 7.

Task-number: QTBUG-95413
Change-Id: I170d8db19033ee71e495ff0c5c1a517a41ed7634
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>

This type has been used internally as QQuickAttachedObject by the
Imagine, Material and Universal styles to enable propagation of colors,
dark mode flags, etc. for a while now. Users would benefit from having
access to it to create their own styles (although it's not just limited
to that use case).

This patch:

- Makes the type public in quickcontrols2.
- Adds documentation and an example.
- Fixes the test_window test to ensure that propagation through child
  windows actually works.

[ChangeLog][Controls] Added QQuickAttachedPropertyPropagator, which
provides a way to propagate attached properties from parent objects
to children. This is especially useful when creating your own style.

Fixes: QTBUG-63267
Change-Id: I2f1794dc4a9f2be56fad2f5e5f39e2ab845157fa
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>

Task-number: QTBUG-105718
Change-Id: Id89ed14990804a5024183e75382cc539d4293da1
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>

Types that use declarative registration do not need
QML_DECLARE_TYPEINFO.

Fixes: QTBUG-104837
Change-Id: I3dadc1d4f638ed2ea7ee015bc229a875929e6387
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>

Pick-to: 6.2 6.3 6.4
Change-Id: I5babc12a37b878ce693bad136d0e60e937f8e039
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>

831efa14e91cfa358e57a32197578d41c2ae1b24 made disabled items get hover
events, so we need to check if a control is disabled before showing
hover effects.

Task-number: QTBUG-94919
Pick-to: 6.2 6.3 6.4
Change-Id: I36d1696b0cf2ee6a705804d25c1374ab367a6925
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

CMakeLists.txt and .cmake files of significant size
(more than 2 lines according to our check in tst_license.pl)
now have the copyright and license header.

Existing copyright statements remain intact

Task-number: QTBUG-88621
Change-Id: I72c89a98c42bbc9234d8495e9e503bec81d11037
Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>

The Item's palette property and Control's font property returns the
resolved value; its resolveMask is inherited from parent object, when
the return value is used in the qml. For example:

ApplicationWindow {
    id: window
    palette { window: "blue"; windowText: "blue" }

    Control {
        id: control
    }

    Button {
        onClicked: {
            control.palette.window = "red"
            window.palette.windowText = "red"
            console.log(control.palette.windowText)
        }
    }
}

In Button.onClicked, `control.palette` is the `resolvedPalette`
of Control, it's resolveMask is not 0. Next, the new value is assigned
to the control, then the control's "requestedPalette" will change to the
new value, and it's resolveMask also is not 0. Next,
`window.palette.windowText = "red"` changes the `windowText` palette for
the window; QQuickPaletteColorProvider::inheritPalette() will be called.
Because the resolveMask of `requestedPalette` is equal to the new
palette, the control will not inherit any colors from its parent. So
`console.log(control.palette.windowText)` was printing `qml: #0000ff`,
but the right result is `qml: #ff0000`.

When PaletteProvider is missing the inherited struct, fallbackPalette is
now used as parentPalette.

[ChangeLog][Controls] Controls now inherit palette and font from parents.

Done-With: Volker Hilsheimer <volker.hilsheimer@qt.io>
Done-With: yeshanshan <yeshanshan@uniontech.com>
Done-With: Shawn Rutledge <shawn.rutledge@qt.io>
Pick-to: 6.4
Fixes: QTBUG-101480
Change-Id: Ibe400f647512331352bf34dee42f908fb7a8d914
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
Reviewed-by: Oliver Eftevaag <oliver.eftevaag@qt.io>

Replace the current license disclaimer in files by
a SPDX-License-Identifier.
Files that have to be modified by hand are modified.
License files are organized under LICENSES directory.

Pick-to: 6.4
Task-number: QTBUG-67283
Change-Id: I63563bbeb6f60f89d2c99660400dca7fab78a294
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>

QColor is referenced as parameter.

Change-Id: I8042de7e4113b461c2baf6a40adb121b40661d85
Reviewed-by: Maximilian Goldstein <max.goldstein@qt.io>