Fixes #4309: Do not allow empty command to be sent

src/status_im/chat/views/input/send_button.cljs

@@ -15,6 +15,10 @@
        (animation/timing spin-value {:toValue  to-spin-value
                                      :duration 300})))))
 
+(defn sendable? [input-text]
+  (let [trimmed (string/trim input-text)]
+    (not (or (string/blank? trimmed) (= trimmed "/")))))
+
 (defview send-button-view []
   (letsubs [command-completion                      [:command-completion]
             selected-command                        [:selected-chat-command]
@@ -24,7 +28,8 @@
                                                                                  :command-completion command-completion})]
     {:component-did-update on-update}
     (let [{:keys [hide-send-button sequential-params]} (:command selected-command)]
-      (when (and (not (string/blank? input-text))
+      (when
+       (and (sendable? input-text)
             (or (not selected-command)
                 (some #{:complete :less-than-needed} [command-completion]))
             (not hide-send-button))