add userboxes and use them instead of flash

sass/style.scss

@@ -253,3 +253,27 @@ input[type="text"], input[type="password"] {
   box-sizing: border-box;
   background-color: $lighter;
 }
+
+.infobox {
+  border: 2px solid black;
+  background-color: $accent_color;
+  padding: 20px 15px;
+  
+  &.critical {
+    background-color: rgb(237, 129, 129);
+  }
+  
+  &.warn {
+    background-color: #fbfb8d;
+  }
+}
+
+.infobox > span {
+  display: flex;
+  align-items: center;
+}
+
+.infobox-icon-container {
+  min-width: 60px;
+  padding-right: 15px;
+}