core: add item "mouse_status" in default status bar

ChangeLog.adoc

@@ -32,6 +32,7 @@ New features::
   * core: add access to hashtable properties in evaluation of expressions (issue #1888)
   * core: display similar command names when a command is unknown (issue #1877)
   * core, plugins: make many identifiers case sensitive (issue #1872, issue #398, bug #32213)
+  * core: add item "mouse_status" in default status bar
   * api: add function config_set_version (issue #1238)
   * alias: use lower case for default aliases, rename all aliases to lower case on upgrade (issue #1872)
   * irc: add command `/rules` (issue #1864)

src/gui/gui-bar.c

@@ -80,7 +80,8 @@ char *gui_bar_default_values[GUI_BAR_NUM_DEFAULT_BARS][GUI_BAR_NUM_OPTIONS] =
       "1", "0", "default", "cyan", "blue", "darkgray", "off",
       "[time],[buffer_last_number],[buffer_plugin],buffer_number+:+"
       "buffer_name+(buffer_modes)+{buffer_nicklist_count}+buffer_zoom+"
-      "buffer_filter,scroll,[lag],[hotlist],[typing],completion" },
+      "buffer_filter,mouse_status,scroll,[lag],[hotlist],[typing],"
+      "completion" },
     /* nicklist */
     { "off", "200", "window", "${nicklist}", "right",
       "columns_vertical", "vertical",