Fix various small issues to the teams, add some more validation

assets/layers/pharmacy/pharmacy.json

@@ -3,6 +3,9 @@
   "name": {
     "en": "pharmacy"
   },
+  "description": {
+    "en": "A layer showing pharmacies, which (probably) dispense prescription drugs"
+  },
   "title": {
     "render": {
       "en": "{name}"

assets/layers/pharmacy/pharmacy.svg

@@ -1,6 +1,4 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!-- Created with Inkscape (http://www.inkscape.org/) -->
 <svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="500" height="500" viewBox="0 0 14 14">
-  <rect width="14" height="14" x="0" y="0" id="canvas" style="fill:none;stroke:none;visibility:hidden"/>
   <path d="m 4,4 -2,2 0,8 10,0 0,-8 -2,-2.0000003 z m 2,2 2,0 0,2 2,0 0,2 -2,0 0,2 -2,0 0,-2 -2,0 0,-2 2,0 z M 4,0 4,3 10,3 10,0 z" id="pharmacy" style="fill:#BF0000"/>
 </svg>