Unify this with the rest of xaudio.

The big win here is getting rid of the reimplementation of wcsdup.

shell32/tests: Move tests of IExplorerBrowser_SetFolderSettings() to a separated function and more tests.

Only pre-win7 systems return E_INVALIDARG for invalid values, and only pre-vista
systems accept FVM_AUTO as a view mode, others fall it back to FVM_ICON. Let's
switch to modern behaviours, so that we don't need additional code for handling
that when using it to implement IExplorerBrowser_SetFolderSettings().

server: Return STATUS_IMAGE_MACHINE_TYPE_MISMATCH when the mapping's machine differs from the process.

Based on a patch by Nikolay Sivov.

Based on a patch by Nikolay Sivov.

Based on a patch by Nikolay Sivov.

Otherwise Gecko keeps it running when it is created via put_classid, and
it leaks everything due to holding a ref to it.
Signed-off-by: Gabriel Ivăncescu <gabrielopcode@gmail.com>

When the plugin host is created, its only ref is being held by the element
it is associated with.
Signed-off-by: Gabriel Ivăncescu <gabrielopcode@gmail.com>

Currently this worked by luck because it is leaking; the element holding
it never releases it.
Signed-off-by: Gabriel Ivăncescu <gabrielopcode@gmail.com>