fix incorrect min-width media queries

app/assets/stylesheets/framework/pagination.scss

@@ -43,7 +43,7 @@
 /**
  * Small screen pagination
  */
-@media (max-width: $screen-xs) {
+@media (max-width: $screen-xs-min) {
   .gl-pagination {
     .pagination li a {
       padding: 6px 10px;
@@ -62,7 +62,7 @@
 /**
  * Medium screen pagination
  */
-@media (min-width: $screen-xs) and (max-width: $screen-md-max) {
+@media (min-width: $screen-xs-min) and (max-width: $screen-md-max) {
   .gl-pagination {
     .page {
       display: none;

app/assets/stylesheets/pages/tree.scss

@@ -31,7 +31,7 @@
       .last-commit {
         @include str-truncated(506px);
 
-        @media (min-width: $screen-sm-max) and (max-width: $screen-md-max) {
+        @media (min-width: $screen-md-min) and (max-width: $screen-md-max) {
           @include str-truncated(450px);
         }