added a button to clear gtk4 symlinks in one click

langs/en_US.json

@@ -2,6 +2,7 @@
   "apply": "Apply",
   "button": "Button",
   "check-button": "Check button",
+  "clear": "Clear",
   "close": "Close",
   "color-scheme": "Color scheme",
   "cursor-size": "Cursor size",

langs/ja_JP.json

@@ -2,6 +2,7 @@
   "apply": "適用",
   "button": "ボタン",
   "check-button": "チェックボタン",
+  "clear": "設定をクリア",
   "close": "閉じる",
   "color-scheme": "カラースキーマ",
   "cursor-size": "カーソルサイズ",

langs/pl_PL.json

@@ -2,6 +2,7 @@
   "apply": "Zastosuj",
   "button": "Przycisk",
   "check-button": "Przycisk wyboru",
+  "clear": "Wyczyść",
   "close": "Zamknij",
   "color-scheme": "Schemat kolorów",
   "cursor-size": "Rozmiar kursora",

langs/ru_RU.json

@@ -2,6 +2,7 @@
   "apply": "Применить",
   "button": "Кнопка",
   "check-button": "Чекбокс",
+  "clear": "Очистить",
   "close": "Закрыть",
   "color-scheme": "Цветовая схема",
   "cursor-size": "Размер курсора",

langs/zh_CN.json

@@ -2,6 +2,7 @@
     "apply": "应用",
     "button": "按钮",
     "check-button": "复选按钮",
+    "clear": "清除设置",
     "close": "关闭",
     "color-scheme": "颜色方案",
     "cursor-size": "光标大小",

uicomponents.go

@@ -680,5 +680,9 @@ func setUpProgramSettingsForm() *gtk.Frame {
 	})
 	g.Attach(cb5, 0, 5, 1, 1)
 
+	btn, _ := gtk.ButtonNewWithLabel(voc["clear"])
+	btn.Connect("clicked", clearGtk4Symlinks)
+	g.Attach(btn, 1, 5, 1, 1)
+
 	return frame
 }