Kinda rough but it works (mostly)

static/crossroad.html

@@ -34,7 +34,7 @@
                         <button onclick="showAddInstanceDialog()">Add an instance</button>
                     </center>
                 </div>
-                <div class="half-width align-self-start">
+                <div class="half-width">
                     <div class="flex-hcenter">
                         <div class="flex-column buttonPanel">
                             <button id="redirect">Redirect</button>
@@ -99,6 +99,7 @@ Unchecking this is not recommended, and this option only exists for exceptional
                         <div>
                             <label for="iconContainer">Instance icon</label>
                             <div id="iconContainer" class="square iconContainer">
+                                <!-- This data URI is for a transparent gif image -->
                                 <img id="instanceIcon" alt="Icon for the selected instance" class="icon" />
                             </div>
                         </div>

static/crossroad.mts

@@ -44,7 +44,7 @@ export const {
 
     findPreOrFail(document.body, "#path").innerText = getTargetPath();
 
-    return initializeAddInstanceFlow(detailsDialog, addDialog);
+    return initializeAddInstanceFlow(detailsDialog, addDialog)
 })();
 
 function updateNoInstanceHint() {

static/main.css

@@ -67,10 +67,6 @@ abbr[title] {
     align-items: center;
 }
 
-.align-self-start {
-    align-self: start;
-}
-
 .flex-vcenter {
     display: flex;
     flex-direction: column;