truncate parameter labels on 1 line and add title for full-text display on mouseover

src/lib/components/legislation_view/parameters/VariableReferredNodeParameter.svelte

@@ -138,9 +138,10 @@
     <div
       bind:this={stickyDiv}
       data-depth={depth}
-      class="sticky-element flex {depth === 1
+      class="sticky-element flex truncate {depth === 1
         ? ''
         : 'h-8'} w-full items-center text-gray-600"
+      title={billParameter.title}
       style="top: {top}rem;"
     >
       <button