Fill the immediate path inside map’s anchors, and remove one extra group

In the map i added in e3503187d, paths around each accommodation
inherited the fill and stroke from the group, thus i could just override
that fill at the anchor level, but the current map sets the fill to each
accommodation’s path, party because the text is not a path too, partly
because Affinity is a visual tool only and does not give a shit about
mark up.

If we keep the text in a group, however, we can set the fill of the area
using CSS too, although it is not nice due to `!important`, but still.
There was a plot, however, #93, that had the area in a group too, and
i had to remove that group manually.

web/static/camper.css

@@ -502,8 +502,8 @@ textarea {
     display: none;
 }
 
-#campground_map a:hover {
-    fill: var(--camper--color--hay);
+#campground_map a:hover > path {
+    fill: var(--camper--color--hay) !important;
 }
 
 /*</editor-fold>*/

web/templates/campground_map.svg

@@ -139,9 +139,7 @@
             </g>
         </g>
         <g id="cp_93">
-            <g transform="matrix(0.997707,0,0,1,-82.6355,-66.1766)">
-                <path d="M288.527,255.599L298.585,259.133L316.861,261.484L347.874,256.938L347.168,285.122L316.103,284.474L280.395,285.688L288.527,255.599Z" style="fill:rgb(239,237,236);stroke:rgb(82,84,83);stroke-width:1px;stroke-miterlimit:2;"/>
-            </g>
+            <path d="m 205.22991,189.4224 10.03493,3.534 18.2341,2.351 30.94188,-4.546 -0.70438,28.184 -30.99376,-0.648 -35.62613,1.214 z" style="fill:rgb(239,237,236);stroke:rgb(82,84,83);stroke-width:1px;stroke-miterlimit:2;"/>
             <g transform="matrix(1,0,0,1,-13.4495,0.21286)">
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