Fix tile padding and margins to be nice and consistent

lib/gencontent.php

@@ -57,6 +57,7 @@ foreach ($tiles as $tile) {
             order: <?php echo $tile["order"]; ?>;
             width: <?php echo round((($tile["width"] * 1.0) / ($pubdata["columns"] * 1.0) * 100)); ?>%;
             flex-basis: <?php echo round((($tile["width"] * 1.0) / ($pubdata["columns"] * 1.0) * 100)); ?>%;
+            flex: 0 0 calc(<?php echo round((($tile["width"] * 1.0) / ($pubdata["columns"] * 1.0) * 100)); ?>% - 10px);
         }
     <?php
 }

static/css/content.css

@@ -2,6 +2,8 @@
     display: flex;
     flex-direction: row;
     flex-wrap: wrap;
+    justify-content: space-between;
+    padding: 5px;
 }
 
 .pub-content {
@@ -11,7 +13,7 @@
 }
 
 .tile {
-    padding: 10px;
+    margin: 5px;
 }
 
 .tile-html {
@@ -19,6 +21,10 @@
     min-height: 10px;
 }
 
+.tile-html img {
+    max-width: 100%;
+}
+
 @media print {
     .pub-content {
         height: 100%;