Implement animated spoilers.

Telegram/SourceFiles/profile/profile_back_button.cpp

@@ -10,6 +10,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 //#include "history/view/history_view_top_bar_widget.h"
 #include "main/main_session.h"
 #include "data/data_session.h"
+#include "ui/painter.h"
 #include "styles/style_widgets.h"
 #include "styles/style_window.h"
 #include "styles/style_profile.h"

Telegram/SourceFiles/profile/profile_block_peer_list.cpp

@@ -9,6 +9,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 
 #include "ui/effects/ripple_animation.h"
 #include "ui/text/text_options.h"
+#include "ui/painter.h"
 #include "data/data_peer.h"
 #include "data/data_cloud_file.h"
 #include "main/main_session.h"

Telegram/SourceFiles/profile/profile_block_widget.cpp

@@ -7,6 +7,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 */
 #include "profile/profile_block_widget.h"
 
+#include "ui/painter.h"
 #include "styles/style_profile.h"
 #include "styles/style_widgets.h"
 

Telegram/SourceFiles/profile/profile_cover_drop_area.cpp

@@ -32,7 +32,7 @@ void CoverDropArea::hideAnimated(HideFinishCallback &&callback) {
 }
 
 void CoverDropArea::paintEvent(QPaintEvent *e) {
-	Painter p(this);
+	auto p = QPainter(this);
 
 	if (_a_appearance.animating()) {
 		p.setOpacity(_a_appearance.value(_hiding ? 0. : 1.));