irc: restore TextViewer default buttons (scroll/find/Close); keep only custom Send button to avoid duplicate Close; fixes live updates

Signed-off-by: Slendi <slendi@socopon.com>

main.lua

@@ -23,7 +23,7 @@ local lfs = require("libs/libkoreader-lfs")
 local IrcChatView = TextViewer:extend{
     title = _("IRC Chat"),
     text = "",
-    add_default_buttons = false,
+    add_default_buttons = true,
     monospace_font = true,
     text_type = "code",
     keep_running = true, -- keep connection alive when UI is closed
@@ -57,12 +57,6 @@ function IrcChatView:init(reinit)
                     self:promptSendMessage()
                 end,
             },
-            {
-                text = _("Close"),
-                callback = function()
-                    self:onClose()
-                end,
-            },
         }
     }
     -- Buffers & title