remove erroneous minicard title whitespace

introduced by the markdown viewer in commit #309c1d0 (the markdown viewer uses <p> tags which have a margin-bottom)

client/components/cards/minicard.styl

@@ -77,6 +77,9 @@
       height: @width
       border-radius: 2px
       margin-left: 3px
+  .minicard-title
+    p:last-child
+      margin-bottom: 0
   .dates
     display: flex;
     flex-direction: row;