Add ctrl+v hotkey to be able copy the bounding boxes from the previous image to the current (#627)

* Add previous bounding boxes code

* Create method to avoid repeated code

* Fix text in the action copyprevbounding

* Add description for different languages

resources/strings/strings-zh-CN.properties

@@ -31,6 +31,7 @@ save=保存
 saveAs=另存为
 fitWinDetail=缩放到当前窗口大小
 openDir=打开目录
+copyPrevBounding=复制当前图像中的上一个边界框
 showHide=显示/隐藏标签
 changeSaveFormat=更改存储格式
 shapeFillColor=填充颜色

resources/strings/strings-zh-TW.properties

@@ -31,6 +31,7 @@ save=儲存
 saveAs=另存為
 fitWinDetail=縮放到窗口一樣
 openDir=開啟目錄
+copyPrevBounding=複製當前圖像中的上一個邊界框
 showHide=顯示/隱藏標籤
 changeSaveFormat=更改儲存格式
 shapeFillColor=填充顏色

resources/strings/strings.properties

@@ -3,6 +3,7 @@ openFileDetail=Open image or label file
 quit=Quit
 quitApp=Quit application
 openDir=Open Dir
+copyPrevBounding=Copy previous Bounding Boxes in the current image 
 changeSavedAnnotationDir=Change default saved Annotation dir
 openAnnotation=Open Annotation
 openAnnotationDetail=Open an annotation file