Fix incorrect bank set / sample addition logic

Closes ppy#29361.

Typical case of a few early-returns gone wrong leading to `NodeSamples`
not being checked correctly.

osu.Game/Screens/Edit/Compose/Components/EditorSelectionHandler.cs

@@ -229,7 +229,7 @@ bool hasRelevantBank(HitObject hitObject)
 
             EditorBeatmap.PerformOnSelection(h =>
             {
-                if (h.Samples.All(s => s.Bank == bankName))
+                if (hasRelevantBank(h))
                     return;
 
                 h.Samples = h.Samples.Select(s => s.With(newBank: bankName)).ToList();
@@ -269,10 +269,8 @@ public void AddHitSample(string sampleName)
             EditorBeatmap.PerformOnSelection(h =>
             {
                 // Make sure there isn't already an existing sample
-                if (h.Samples.Any(s => s.Name == sampleName))
-                    return;
-
-                h.Samples.Add(h.CreateHitSampleInfo(sampleName));
+                if (h.Samples.All(s => s.Name != sampleName))
+                    h.Samples.Add(h.CreateHitSampleInfo(sampleName));
 
                 if (h is IHasRepeats hasRepeats)
                 {