wpf: Fixed TagsEditor

InABox.Core/Objects/Editors/TagsEditor.cs

@@ -37,7 +37,7 @@ namespace InABox.Core
                 }
                 else
                 {
-                    nextIdx += 1;
+                    nextIdx += Prefix.Length;
                 }
                 var endIdx = tags.IndexOf(Separator, nextIdx);
                 if(endIdx == -1)
@@ -47,8 +47,8 @@ namespace InABox.Core
                 }
                 else
                 {
-                    yield return tags[nextIdx..(endIdx - 1)];
-                    idx = endIdx + 1;
+                    yield return tags[nextIdx..endIdx];
+                    idx = endIdx + Separator.Length;
                 }
             }
         }