zentk - folder select workaround (LostRuins#1478)

* zentk - folder select workaround

* kcppt extention fix

Author: henk717

koboldcpp.py

@@ -3528,7 +3528,11 @@ def zenity(typ, filetypes=None, initialdir="", initialfile="", **kwargs) -> Tupl
 
 def zentk_askopenfilename(**options):
     try:
+        from os.path import isfile
         result = zenity('file-selection', filetypes=options.get("filetypes"), initialdir=options.get("initialdir"), title=options.get("title"))[1]
+        if result and not isfile(result):
+            print("A folder was selected while we need a file, ignoring selection.")
+            return ''
     except:
         from tkinter.filedialog import askopenfilename
         result = askopenfilename(**options)
@@ -4420,7 +4424,7 @@ def kcpp_export_template():
             return
         filenamestr = str(filename).strip()
         if not filenamestr.endswith(".kcppt"):
-            filenamestr += ".kcpps"
+            filenamestr += ".kcppt"
         file = open(filenamestr, 'w')
         file.write(json.dumps(savdict))
         file.close()