fix several propType errors raised by 'react.development.js'

some are caused by typo, some are caused by unused propType declarations

browser/components/NoteItem.js

@@ -148,15 +148,14 @@ NoteItem.propTypes = {
     tags: PropTypes.array,
     isStarred: PropTypes.bool.isRequired,
     isTrashed: PropTypes.bool.isRequired,
-    blog: {
+    blog: PropTypes.shape({
       blogLink: PropTypes.string,
       blogId: PropTypes.number
-    }
+    })
   }),
   handleNoteClick: PropTypes.func.isRequired,
   handleNoteContextMenu: PropTypes.func.isRequired,
-  handleDragStart: PropTypes.func.isRequired,
-  handleDragEnd: PropTypes.func.isRequired
+  handleDragStart: PropTypes.func.isRequired
 }
 
 export default CSSModules(NoteItem, styles)

browser/components/SideNavFilter.js

@@ -74,7 +74,7 @@ SideNavFilter.propTypes = {
   isStarredActive: PropTypes.bool.isRequired,
   isTrashedActive: PropTypes.bool.isRequired,
   handleStarredButtonClick: PropTypes.func.isRequired,
-  handleTrashdButtonClick: PropTypes.func.isRequired
+  handleTrashedButtonClick: PropTypes.func.isRequired
 }
 
 export default CSSModules(SideNavFilter, styles)

browser/components/TodoProcess.js

@@ -25,10 +25,10 @@ const TodoProcess = ({
 )
 
 TodoProcess.propTypes = {
-  todoStatus: {
+  todoStatus: PropTypes.exact({
     total: PropTypes.number.isRequired,
     completed: PropTypes.number.isRequired
-  }
+  })
 }
 
 export default CSSModules(TodoProcess, styles)