wrap call to function with params into lambda...

src/SpTiers.svelte

@@ -46,7 +46,7 @@
             on:click={swapTier(tier, -1)}
                   disabled={i == 0 ? true : false}>⇑</button
                                                     >
-          <button type="button" on:click={removeTier(tier)}>×</button>
+          <button type="button" on:click={()=> removeTier(tier)}>×</button>
         </div>
       </div>
     {/each}