Don't reset interface scale to auto on Settings open.

Telegram/SourceFiles/settings/settings_main.cpp

@@ -259,6 +259,8 @@ void SetupInterfaceScale(
 	slider->sectionActivated(
 	) | rpl::map([=](int section) {
 		return scaleByIndex(section);
+	}) | rpl::filter([=](int scale) {
+		return cEvalScale(scale) != cEvalScale(cConfigScale());
 	}) | rpl::start_with_next([=](int scale) {
 		setScale(
 			(scale == cScreenScale()) ? style::kScaleAuto : scale,

Telegram/SourceFiles/ui/widgets/discrete_sliders.cpp

@@ -47,6 +47,10 @@ void DiscreteSlider::setActiveSectionFast(int index) {
 void DiscreteSlider::finishAnimating() {
 	_a_left.stop();
 	update();
+	_callbackAfterMs = 0;
+	if (_timerId >= 0) {
+		activateCallback();
+	}
 }
 
 void DiscreteSlider::setSelectOnPress(bool selectOnPress) {