Move standard buttons to lib_ui.

Telegram/SourceFiles/profile/profile_back_button.cpp

@@ -46,7 +46,7 @@ void BackButton::paintEvent(QPaintEvent *e) {
 
 void BackButton::onStateChanged(State was, StateChangeSource source) {
 	if (isDown() && !(was & StateFlag::Down)) {
-		emit clicked();
+		clicked(Qt::KeyboardModifiers(), Qt::LeftButton);
 	}
 }
 

Telegram/SourceFiles/profile/profile_block_widget.h

@@ -38,9 +38,7 @@ protected:
 	int resizeGetHeight(int newWidth) override = 0;
 
 	void contentSizeUpdated() {
-		auto oldHeight = height();
 		resizeToWidth(width());
-		emit heightUpdated();
 	}
 
 	PeerData *peer() const {