1.3.1 - Graphing Fixes Cont'd

app/src/main/java/com/atridad/openclimb/ui/screens/AnalyticsScreen.kt

@@ -132,14 +132,12 @@ fun ProgressChartCard(
     progressData: List<ProgressDataPoint>,
     problems: List<com.atridad.openclimb.data.model.Problem>,
 ) {
-    // Find all grading systems that have been used
-    val usedSystems = remember(problems) {
-        problems.map { it.difficulty.system }.distinct().filter { system ->
-            problems.any { it.difficulty.system == system }
-        }
+    // Find all grading systems that have been used in the progress data
+    val usedSystems = remember(progressData) {
+        progressData.map { it.difficultySystem }.distinct()
     }
     
-    var selectedSystem by remember { 
+    var selectedSystem by remember(usedSystems) { 
         mutableStateOf(usedSystems.firstOrNull() ?: DifficultySystem.V_SCALE) 
     }
     var expanded by remember { mutableStateOf(false) }