Add wxUSE_TASKBARBUTTON under MSW port.

Taskbar button features are only available under MSW port.

Author: Chaobin Zhang

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77570 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Register message "TaskbarButtonCreated" when wxTopLevelWindowMSW is created.

This message is used to make sure the taskbar button is in place, so
wxTaskbarButton object can initialize correctly.

Author: Chaobin Zhang

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77571 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Introduce skeleton of taskbar button feature.

- Add classes: wxTaskBarButton and wxTaskBarButtonImpl.
- New interface in wxTopLevelWindowMSW to get its wxTaskBarButton:
    MSWGetTaskBarButton.
- A simple sample and build files under msvc.

Author: Chaobin Zhang

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77572 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
API for change the visibility of button in the taskbar.

- ShowInTaskbar and HideInTaskbar
- Sample of usage.

Author: Chaobin Zhang

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77573 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
APIs to support setting overlay icon, tooltip, thumbnail clip, progress state.

Author: Chaobin Zhang

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77574 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
APIs for adding a thumbnail toolbar with a specified set of buttons.

- AddThumbBarButton(wxThumbBarButton *button), ShowThumbnailToolbar().
- Add THBN_CLICKED message handler to top level window and generate a
  wxCommandEvent event.
- Sample.

Author: Chaobin Zhang

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77575 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Move taskbar button from wxTopLevelWindowMSW to wxFrame.

Since there are two sub-classes of wxTopLevelWindowMSW: one is wxFrame, the
other is wxDialog. However, wxDialog have no button shown in taskbar on
windows, so the taskbar button feature should be only avaiable in wxFrame.

Author: Chaobin Zhang

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77576 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Only register window message "TaskbarButtonCreated" when the first frame is created.

Author: Chaobin Zhang

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77577 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Expose setting description of overlay icon for accessibility.

Author: Chaobin Zhang

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77578 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
API: SetThumbnailContents, for setting thumbnail contents with child window.

Author: Chaobin Zhang

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77579 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Revise Show/Hide, for consistency with the other classes.

Author: Chaobin Zhang

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77580 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Revise progress releted API to be more usual.

- Add PulseProgress
- Add SetProgressRange, instead of hard coding 100.

Author: Chaobin Zhang

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77581 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Nit: fix code style.

Author: Chaobin Zhang

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77582 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Work around the limitation of windows API when setting thumbnail toolbar buttons.

- New API: InsertThumbBarButton, AppendThumbBarButton, RemoveThumbBarButton.
- Though MSDN said that "Buttons cannot be added or deleted later, so this must
  be the full defined set. Buttons also cannot be reordered.", we can work
  around it by: when first time adding button, initialize all of the possible
  seven buttons and hide them, except the button adding. In the next time adding
  button, just show it, which can make it looks like it is added on the fly.

Author: Chaobin Zhang

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77583 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Fix mingw build error of ITaskbarList3.

Author: Chaobin Zhang

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77584 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Move wxTaskBarButton into core library.

Author: Chaobin Zhang

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77585 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Coding style fix.

Author: Chaobin Zhang

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77586 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Add doxygen docs of wxTaskBarButton.

Author: Chaobin Zhang

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77587 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Allow 2-phase creation of wxThumbBarButton.

Author: Chaobin Zhang

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77588 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Reverting failed mering of SOC2014_TASKBAR.

Command: git svn dcommit is aborted, and the two branches is diverged.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77589 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775