few more details about block added

src/page.h

@@ -348,6 +348,8 @@ namespace xmreg {
             // transcation in the block
             vector<crypto::hash> tx_hashes = blk.tx_hashes;
 
+            bool have_txs = !blk.tx_hashes.empty();
+
             // initalise page tempate map with basic info about blockchain
             mstch::map context {
                     {"blk_hash"       , blk_hash_str},

src/templates/block.html

@@ -1,15 +1,15 @@
 
 <div>
 
-    <H3>Block hash (height): {{blk_hash}} ({{blk_height}})</H3>
+    <H4>Block hash (height): {{blk_hash}} ({{blk_height}})</H4>
 
 
     {{#have_prev_hash}}
-    <H4>Previous block: <a href="/block/{{prev_hash}}">{{prev_hash}}</a></H4>
+    <H5>Previous block: <a href="/block/{{prev_hash}}">{{prev_hash}}</a></H5>
     {{/have_prev_hash}}
 
     {{#have_next_hash}}
-    <H4>Next block: <a href="/block/{{next_hash}}">{{next_hash}}</a></H4>
+    <H5>Next block: <a href="/block/{{next_hash}}">{{next_hash}}</a></H5>
     {{/have_next_hash}}
 
 
@@ -18,7 +18,7 @@
         <tr>
             <td>Timestamp [UCT]:</td><td>{{blk_timestamp}}</td>
             <td>Age {{age_format}}:</td><td>{{blk_age}}</td>
-            <td>Time from previous block [h:m:s]:</td><td>{{delta_time}}</td>
+            <td>Δ [h:m:s]:</td><td>{{delta_time}}</td>
         </tr>
         <tr>
             <td>Major version:</td><td>{{major_ver}}</td>