Minor naming improvements

Shared/Modifiers/RedrawOnModifier.swift

@@ -0,0 +1,19 @@
+import SwiftUI
+
+struct RedrawOnModifier: ViewModifier {
+    @State private var changeFlag: Bool
+
+    init(changeFlag: Bool) {
+        self.changeFlag = changeFlag
+    }
+
+    func body(content: Content) -> some View {
+        content.opacity(changeFlag ? 1 : 1)
+    }
+}
+
+extension View {
+    func redrawOn(change flag: Bool) -> some View {
+        modifier(RedrawOnModifier(changeFlag: flag))
+    }
+}