12: Add resource attribute type

- Added a resource attribute type to both actors and items with the keys
  min, value, and max.
- Added translation strings for the sublabels on resources.

styles/simple.less

@@ -164,6 +164,21 @@
       line-height: 28px;
       border: none;
     }
+
+    .attribute-col {
+      label {
+        font-size: 10px;
+        text-align: center;
+        line-height: 1;
+      }
+
+      input {
+        font-size: 11px;
+        text-align: center;
+        line-height: 1;
+        height: 50%;
+      }
+    }
   }
 }