Responsive and dark mode fixes for apps filter bar

src/theme.scss

@@ -168,7 +168,7 @@ html, body {
     padding: 0;
 }
 
-.filter-bar {
+.view-header-filter-bar {
     position: absolute;
     right: 14px;
     margin-top: 5px;
@@ -181,6 +181,17 @@ html, body {
     box-shadow: 0 6px 12px rgba(0,0,0,.175);
 }
 
+.view-header-search-bar {
+    .input-group {
+        display: inline-block;
+        vertical-align: middle;
+    }
+
+    @media(min-width:768px) {
+        float: right;
+    }
+}
+
 .offline-banner {
     position: fixed;
     z-index: 30000;
@@ -2060,6 +2071,10 @@ tag-input {
         background-color: $backgroundLight;
     }
 
+    .view-header-filter-bar {
+        background-color: $backgroundLight;
+    }
+
     .appstore-toolbar {
         color: $textColor;
     }