fix: centring of text following design feedback

Signed-off-by: Graham White <[email protected]>

src/app.css

@@ -49,3 +49,12 @@ textarea, .wrapper > label {
     width: 50%;
     margin: 0px;
 }
+/* Centre the example text within the example box */
+.example-text-content {
+    margin-top: auto;
+    margin-bottom: auto;
+}
+/* Centre the values in advanced settings */
+.tab-like-container > input {
+    margin-top: 0.15rem;
+}