Merge pull request #3341 from mempool/mononaut/difficulty-skeleton-width

Fix difficulty skeleton width on firefox

frontend/src/app/components/difficulty-mining/difficulty-mining.component.scss

@@ -38,6 +38,7 @@
     flex-direction: row;
   }
   .item {
+    min-width: 120px;
     max-width: 150px;
     margin: 0;
     width: -webkit-fill-available;

frontend/src/app/components/difficulty/difficulty.component.scss

@@ -46,6 +46,7 @@
     flex-direction: row;
   }
   .item {
+    min-width: 120px;
     max-width: 150px;
     margin: 0;
     width: -webkit-fill-available;