fix: Small tweaks to Tile styles that were forgotten in #1560

Automerge went a bit too fast and merged a PR while Argos was reviewing
the screenshots. This commit is little fix that makes the Tile icon on
mobile, the same as it's original look before #1560.

react/Tile/styles.styl

@@ -85,16 +85,14 @@ $tileMobileHeight = 3.75rem
   .Tile-icon-wrapper
     margin-top 0
     margin-bottom 0
-    max-width 2.5rem
-    max-height 2.5rem
+    width 3rem
+    height 2.5rem
 
   .Tile-desc
-    margin-top .125rem
+    margin-top 0
     margin-left .5rem
-    justify-content center
     text-align left
-    /* 4rem for icon and margins */
-    width calc(100% - 4rem)
+    flex-grow 1
 
   .Tile-title
     height 1rem