feat: paginate balanced mobile search results (Closes #783)

frontend/index.html

@@ -430,6 +430,7 @@
   </div>
   <input id="cmd-input" type="text" role="combobox" aria-autocomplete="list" aria-controls="cmd-results" aria-expanded="false" placeholder="Search commands, issues, and pull requests..." />
   <div id="cmd-results" class="stack" role="listbox" aria-label="Commands and work search results"></div>
+  <button id="cmd-load-more" hidden>More results</button>
 </div>
 
 <div class="search-preview" id="search-preview" role="dialog" aria-modal="true" aria-labelledby="search-preview-title">