SearchBar: some more styling fixes

dist/styles/context-menu.css

@@ -31,6 +31,7 @@
   margin-top: 11px;
   text-align: center;
   max-width: 800px;
+  height: 33px;
   float: left;
   display: grid;
   grid-template-columns: auto auto auto;

src/Gargantext/Pages/Layout/Specs/SearchBar.purs

@@ -63,7 +63,7 @@ toggleButton :: R.State Boolean -> R.Element
 toggleButton open =
   H.button { onClick: onToggleExpanded open, className: "search-bar-toggle" }
     [ H.i { className: "material-icons md-24"
-          , style: { marginTop: "-5px", color: "#000" } }
+          , style: { marginTop: "-2px", color: "#000" } }
           [ H.text "control_point" ] ]
 
 onToggleExpanded :: forall e. R.State Boolean -> EffectFn1 e Unit