PLT-3817 - Updating flag icon (#3750)

* Updating flag icon

* Updating padding for user list

* Removing stroke from hover

* PLT-3794 - Fixing integrations css

webapp/sass/layout/_headers.scss

@@ -396,7 +396,7 @@
 
         .icon__flag {
             svg {
-                height: 18px;
+                height: 19px;
                 position: relative;
                 top: 2px;
                 width: 19px;

webapp/sass/layout/_sidebar-right.scss

@@ -178,7 +178,7 @@
         }
 
         .usage__icon {
-            @include opacity(.6);
+            @include opacity(.9);
             margin: 0 3px;
             position: relative;
             top: 1px;