set explicit text-decocation on .tsmb-foot anchor link

We set this explicitly do this on the anchor links in the search
results (both initial and :hover). We didn't yet do this on the
footer, which meant that on mostly unstyled pages, or sites that
apply text-decoration:underline to anchor links pre-hover, would
leak into the widget, and this would then oddly go away on-hover,
which is kind of the opposite of what you'd expect.

The odd selector rule in the codebase was biased by our demo, so
I've adjusted the demo to be a bit more hostile by default (and
arguably improve accessibility for other links in the demo) to make
this less likely to regress in the future.

Author: Krinkle

demo/demo.css

@@ -12,9 +12,9 @@ body {
 
 a {
   color: #9c3493;
-  text-decoration: none;
 }
 
+a,
 a:active,
 a:hover,
 a:focus {

typesense-minibar.css

@@ -181,15 +181,14 @@
   padding: var(--tsmb-size-base);
 }
 
-.tsmb-foot {
+.tsmb-foot,
+.tsmb-foot:hover {
   display: block;
   text-align: right;
   font-size: var(--tsmb-size-sm);
   line-height: 18px;
   padding: var(--tsmb-size-half) var(--tsmb-size-sm);
   box-shadow: 0 0 10px rgba(0,0,0,0.12);
-}
-.tsmb-foot:hover {
   text-decoration: none;
 }
 .tsmb-foot::before {