fix: adv filter tag sizing bug fix

Author: zainkai

src/Assets/Styles/firefox.less

@@ -0,0 +1,9 @@
+@import "constants";
+
+// target any firefox version
+@-moz-document url-prefix() {
+  //Advanced filter button widths fix.
+  .nested-btn-group.btn-group-sm .btn-group .btn:last-child {
+    margin-right: 8.19px;
+  }
+}

src/Assets/Styles/sb-components.less

@@ -33,3 +33,4 @@
 
 //## Browser Specific
 @import "internet-explorer";
+@import "firefox";