Untranslated lock icon (#568)

Sorry my OCD is kicking in... It's super weird that the base of the lock moves when we check / unckeck it. Instead, just the semi-circle shape should move (what this PR implements).

src/components/ToolIcon.scss

@@ -17,6 +17,7 @@
   border-radius: var(--space-factor);
 
   svg {
+    position: relative;
     height: 1em;
   }
 }