[chore, UX] Move some 'permanent' settings inside more_tools (#6282)

Err, kind of nitpick PR. Is just add some "permanent" menus other than plugins to the new "more_tools" submenu. So it will never be empty.

Follow-up: #6279
Supersedes: #5512 #6092
Fixes: #5461

frontend/ui/elements/common_info_menu_table.lua

@@ -25,7 +25,7 @@ common_info.version = {
 common_info.help = {
     text = _("Help"),
 }
-common_info.more_plugins = {
+common_info.more_tools = {
     text = _("More tools"),
 }
 

frontend/ui/elements/filemanager_menu_order.lua

@@ -101,19 +101,19 @@ local order = {
         "send2ebook",
         "text_editor",
         "----------------------------",
-        "more_plugins",
+        "more_tools",
-        "plugin_management",
-        "----------------------------",
-        "advanced_settings",
-        "developer_options",
     },
-    more_plugins = {
+    more_tools = {
         "auto_frontlight",
         "battery_statistics",
         "synchronize_time",
         "keep_alive",
         "doc_setting_tweak",
         "terminal",
+        "----------------------------",
+        "plugin_management",
+        "advanced_settings",
+        "developer_options",
     },
     search = {
         "dictionary_lookup",

frontend/ui/elements/reader_menu_order.lua

@@ -125,16 +125,17 @@ local order = {
         "send2ebook",
         "text_editor",
         "----------------------------",
-        "more_plugins",
+        "more_tools",
-        "plugin_management",
     },
-    more_plugins = {
+    more_tools = {
         "auto_frontlight",
         "battery_statistics",
         "synchronize_time",
         "keep_alive",
         "doc_setting_tweak",
         "terminal",
+        "----------------------------",
+        "plugin_management",
     },
     search = {
         "dictionary_lookup",