Improve layout for mobile

apps/client/src/app/components/benchmark-comparator/benchmark-comparator.component.html

@@ -1,4 +1,5 @@
-<div class="align-items-center d-flex">
+<div class="row">
+  <div class="col-md-6 col-xs-12 d-flex">
     <div class="align-items-center d-flex flex-grow-1 h5 mb-0 text-truncate">
       <span i18n>Benchmarks</span>
       <sup i18n>Beta</sup>
@@ -7,8 +8,9 @@
         class="ml-1"
       ></gf-premium-indicator>
     </div>
-  <div>
-    <mat-form-field appearance="outline" class="w-100">
+  </div>
+  <div class="col-md-6 col-xs-12 d-flex justify-content-end">
+    <mat-form-field appearance="outline" class="w-100" color="accent">
       <mat-label i18n>Compare with...</mat-label>
       <mat-select
         name="benchmark"