Make buttons and tabs larger in QML examples and dialogs

Task-number: QTBUG-32578
Change-Id: Ic89058abc55e5e079f44862986b2132114456147
Reviewed-by: Liang Qi <liang.qi@digia.com>
QtQuick.Dialogs.ColorDialog: set current color in the QColorDialog

It was a missing feature to set the current color programmatically,
either before or after showing the dialog.

Task-number: QTBUG-32621
Change-Id: I62a811f7c36eaab5356c5924bf3447deca55ada3
Reviewed-by: Liang Qi <liang.qi@digia.com>
Doc: Remove unused /parts directory from QML getting started example

The example code for getting started with QML doc has six smaller
projects under /parts - these out of sync with the main example
code in its parent directory, they are undocumented and not referred
to in any other documentation. The QML getting started guide itself
uses \code blocks to present the code snippets.

Change-Id: I3b9c83a60fdeb9fa13f364b04c38943222c682cb
Reviewed-by: Alan Alpert <aalpert@blackberry.com>
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Doc: Update example used for QML getting started tutorial

Update the example project referred to in Getting Started with Qt
Quick tutorial.

    - Fix coding/comment style issues
    - Change plugin TARGET name, Use /imports as the
      destination directory
    - Fix qmldir with proper module info, delete unused
      qmldir from /core
    - Add a .qmlproject file

Change-Id: If269e61fb76399faae753469dc251d07cc219139
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Merge remote-tracking branch 'origin/release' into stable

Change-Id: I3bcc89d3e503b933e4bd4df241c8169e73fb9bd5
Merge "Merge remote-tracking branch 'origin/release' into stable" into refs/staging/stable