Optimize preview with pngquant 256

Signed-off-by: Egor Savkin <es@m-labs.hk>

static/js/shop.jsx

@@ -1954,7 +1954,7 @@ class Shop extends React.PureComponent {
       source.indexes.forEach((card_index, _) => {
         dragged_items.push(itemsUnfoldedList[card_index]);
       })
-    } else if (source.index >= 0) {
+    } else if (source.index) {
       dragged_items.push(itemsUnfoldedList[source.index]);
     }
 

static/js/shop_data.js

@@ -881,7 +881,7 @@ const shop_data = {
         '~15MHz default analog bandwidth.',
         'AD9117 DACs (14 bits @ 125 MSPS, <1 LSB DNL).',
         'Differential analog output via mini-SAS HD with shielded impedance-matched pairs.',
-        'Included remote analog front-end (AFE) board converts differential signals to ±10V single-ended at the point of use, with additional gain and filtering.',
+        'Included remote analog front-end (AFE) board converts differential signals to +/- 10V single-ended at the point of use, with additional gain and filtering.',
       ],
       size: 'big',
       type: null,
@@ -889,16 +889,8 @@ const shop_data = {
       nbrSlotMin: 0,
       nbrSlotMax: 0,
       nbrClockMax: 0,
-      slotOccupied: 1,
-      clockOccupied: 1,
-      rules: {
-        resources: {
-          type: 'shuttler',
-          icon: '/shop/icon-warning.svg',
-          name: 'Shuttler',
-          message: 'This card needs a card that provides a EEM connector (e.g. Kasli) at its left.',
-        },
-      }
+      slotOccupied: 0,
+      clockOccupied: 0,
     },
     'pounder': {
       id: 'pounder',