correct padding for peripheral tile pane

src/components/connection-modal/connection-modal.css

@@ -29,7 +29,6 @@
     overflow-y: auto;
     width: 100%;
     height: 100%;
-    padding: 0.5rem;
 }
 
 .peripheral-tile {
@@ -225,7 +224,7 @@
     display: flex;
     justify-content: center;
     align-items: center;
-    padding: 1rem .5rem;
+    padding: .5rem;
 }
 
 .scratch-link-help {
@@ -233,6 +232,8 @@
     flex-direction: column;
     justify-content: space-around;
     height: 100%;
+    padding-top: .5rem;
+    padding-bottom: .5rem;
 }
 
 .scratch-link-help-step {