Fix saved file from new empty doc keeping created time tip issue

Fix https://community.notepad-plus-plus.org/topic/26235/notepad-v8-7-1-release-candidate/11?_=1730165549940

PowerEditor/src/NppIO.cpp

@@ -1888,8 +1888,7 @@ bool Notepad_plus::fileSaveAs(BufferID id, bool isSaveCopy)
 	}
 	fDlg.setTitle(localizedTitle.c_str());
 
-	const wstring checkboxLabel = _nativeLangSpeaker.getLocalizedStrFromID("file-save-assign-type",
+	const wstring checkboxLabel = _nativeLangSpeaker.getLocalizedStrFromID("file-save-assign-type", L"&Append extension");
-		L"&Append extension");
 	fDlg.enableFileTypeCheckbox(checkboxLabel, !defaultAllTypes);
 
 	// Disable file autodetection before opening save dialog to prevent use-after-delete bug.

PowerEditor/src/NppNotification.cpp

@@ -1005,6 +1005,9 @@ BOOL Notepad_plus::notify(SCNotification *notification)
 
 					tipTmp = buf->getFullPathName();
 
+					
+					if (buf->isUntitled())
+					{
 						wstring tabCreatedTime = buf->tabCreatedTimeString();
 						if (!tabCreatedTime.empty())
 						{
@@ -1012,6 +1015,7 @@ BOOL Notepad_plus::notify(SCNotification *notification)
 							tipTmp += tabCreatedTime;
 							SendMessage(lpttt->hdr.hwndFrom, TTM_SETMAXTIPWIDTH, 0, 200);
 						}
+					}
 					else
 					{
 						SendMessage(lpttt->hdr.hwndFrom, TTM_SETMAXTIPWIDTH, 0, -1);