Fix pasting images from Firefox on Windows.

Fixes #10564.

Together with the image data Firefox sets to the clipboard an URLs list
which has a path to local temp file, created from that image.

Reading images from disk is slower + sometimes the content of the file
is wrong so for this case we prefer to read the image data directly.

Telegram/SourceFiles/editor/editor_paint.cpp

@@ -7,6 +7,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 */
 #include "editor/editor_paint.h"
 
+#include "core/mime_type.h"
 #include "ui/boxes/confirm_box.h"
 #include "editor/controllers/controllers.h"
 #include "editor/scene/scene.h"
@@ -204,16 +205,17 @@ void Paint::handleMimeData(const QMimeData *data) {
 
 	using Error = Ui::PreparedList::Error;
 	const auto premium = false; // Don't support > 2GB files here.
-	auto result = data->hasUrls()
+	const auto list = Core::ReadMimeUrls(data);
+	auto result = !list.isEmpty()
 		? Storage::PrepareMediaList(
-			base::GetMimeUrls(data).mid(0, 1),
+			list.mid(0, 1),
 			_imageSize.width() / 2,
 			premium)
 		: Ui::PreparedList(Error::EmptyFile, QString());
 	if (result.error == Error::None) {
 		add(base::take(result.files.front().preview));
-	} else if (data->hasImage()) {
-		add(qvariant_cast<QImage>(data->imageData()));
+	} else if (auto read = Core::ReadMimeImage(data)) {
+		add(std::move(read.image));
 	}
 }