1 quick react emoji on sidebar width less than 640px (#29195)

Co-authored-by: Mattermost Build <build@mattermost.com>

webapp/channels/src/utils/constants.tsx

@@ -1662,7 +1662,7 @@ export const Constants = {
     DEFAULT_EMOJI_PICKER_LEFT_OFFSET: 87,
     DEFAULT_EMOJI_PICKER_RIGHT_OFFSET: 15,
     EMOJI_PICKER_WIDTH_OFFSET: 295,
-    SIDEBAR_MINIMUM_WIDTH: 400,
+    SIDEBAR_MINIMUM_WIDTH: 640,
     THEME_ELEMENTS: [
         {
             group: 'sidebarElements',