Add encoding context menu via right/double click on encoding display zone of status bar

Fix #9998, fix #400, fix #756, close #11678

PowerEditor/src/NppNotification.cpp

@@ -448,6 +448,13 @@ BOOL Notepad_plus::notify(SCNotification *notification)
 						return TRUE;
 					TrackPopupMenu(hEolFormatMenu, 0, p.x, p.y, 0, _pPublicInterface->getHSelf(), NULL);
 				}
+				else if (lpnm->dwItemSpec == DWORD(STATUSBAR_UNICODE_TYPE))
+				{
+					POINT p;
+					::GetCursorPos(&p);
+					HMENU hLangMenu = ::GetSubMenu(_mainMenuHandle, MENUINDEX_FORMAT);
+					TrackPopupMenu(hLangMenu, 0, p.x, p.y, 0, _pPublicInterface->getHSelf(), NULL);
+				}
 			}
 			break;
 		}
@@ -484,6 +491,13 @@ BOOL Notepad_plus::notify(SCNotification *notification)
 						return TRUE;
 					TrackPopupMenu(hEolFormatMenu, 0, p.x, p.y, 0, _pPublicInterface->getHSelf(), NULL);
 				}
+				else if (lpnm->dwItemSpec == DWORD(STATUSBAR_UNICODE_TYPE))
+				{
+					POINT p;
+					::GetCursorPos(&p);
+					HMENU hLangMenu = ::GetSubMenu(_mainMenuHandle, MENUINDEX_FORMAT);
+					TrackPopupMenu(hLangMenu, 0, p.x, p.y, 0, _pPublicInterface->getHSelf(), NULL);
+				}
 				return TRUE;
 			}
 			else if (_pDocumentListPanel && notification->nmhdr.hwndFrom == _pDocumentListPanel->getHSelf())