Save temporary patch file and rename it over desired patch.

src/app/RackScrollWidget.cpp

@@ -43,7 +43,7 @@ void RackScrollWidget::step() {
 	math::Rect scrollBox = moduleBox;
 	scrollBox.pos = scrollBox.pos.mult(zoom);
 	scrollBox.size = scrollBox.size.mult(zoom);
-	scrollBox = scrollBox.grow(box.size.div(2));
+	scrollBox = scrollBox.grow(box.size.mult(0.6666));
 
 	// Expand to the current viewport box so that moving modules (and thus changing the module bounding box) doesn't clamp the scroll offset.
 	math::Rect viewportBox;

src/patch.cpp

@@ -81,16 +81,17 @@ void PatchManager::save(std::string path) {
 		json_decref(rootJ);
 	});
 
-	FILE *file = std::fopen(path.c_str(), "w");
+	// Write to temporary path and then rename it to the correct path
+	std::string tmpPath = path + ".tmp";
+	FILE *file = std::fopen(tmpPath.c_str(), "w");
 	if (!file) {
 		// Fail silently
 		return;
 	}
-	DEFER({
-		std::fclose(file);
-	});
 
 	json_dumpf(rootJ, file, JSON_INDENT(2) | JSON_REAL_PRECISION(9));
+	std::fclose(file);
+	std::rename(tmpPath.c_str(), path.c_str());
 }
 
 void PatchManager::saveDialog() {