Start git without a console window on Windows, and run one reload at a time

src/App.vue

@@ -105,11 +105,18 @@ function startDrag(e: PointerEvent, axis: "x" | "y") {
 
 let filtersLoadedFor: string | null = null;
 
+let loading = false;
+
 async function load() {
+  // The window gets focus often; one reload at a time is enough.
+  if (loading) return;
+  loading = true;
   try {
     await applyRepo(await invoke<RepoData>("load_repo"));
   } catch (e) {
     error.value = String(e);
+  } finally {
+    loading = false;
   }
 }