Arrange buttons in a grid

res/css/_components.scss

@@ -118,6 +118,7 @@
 @import "./views/messages/_MessageActionBar.scss";
 @import "./views/messages/_MessageTimestamp.scss";
 @import "./views/messages/_ReactionDimension.scss";
+@import "./views/messages/_ReactionQuickTooltip.scss";
 @import "./views/messages/_ReactionTooltipButton.scss";
 @import "./views/messages/_ReactionsRow.scss";
 @import "./views/messages/_ReactionsRowButton.scss";

res/css/views/messages/_ReactionQuickTooltip.scss

@@ -0,0 +1,20 @@
+/*
+Copyright 2019 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+.mx_ReactionsQuickTooltip {
+    display: grid;
+    grid-template-columns: repeat(4, auto);
+}

res/css/views/messages/_ReactionTooltipButton.scss

@@ -16,6 +16,7 @@ limitations under the License.
 
 .mx_ReactionTooltipButton {
     font-size: 16px;
+    padding: 6px;
     user-select: none;
 }