Major demo refresh.. switched everything to new function names, new design patterns

Out with the old, in with the new!!

Demo_Table_Element.py

@@ -1,5 +1,6 @@
 import csv
 import PySimpleGUI as sg
+import sys
 
 filename = sg.PopupGetFile('filename to open', no_window=True, file_types=(("CSV Files","*.csv"),))
 # --- populate table with file contents --- #
@@ -11,7 +12,7 @@ if filename is not None:
             data = list(reader)  # read everything else into a list of rows
         except:
             sg.PopupError('Error reading file')
-            exit(69)
+            sys.exit(69)
 
 sg.SetOptions(element_padding=(0, 0))
 
@@ -19,11 +20,8 @@ col_layout = [[sg.Table(values=data[1:][:], headings=[data[0][x] for x in range(
                         auto_size_columns=True, display_row_numbers=True, justification='right', size=(None, len(data)))]]
 
 layout = [[sg.Column(col_layout, size=(1200,600), scrollable=True)],]
-form = sg.FlexForm('Table', grab_anywhere=False)
-form.Layout(layout)
+window = sg.Window('Table', grab_anywhere=False).Layout(layout)
 
-form.Finalize()
+b, v = window.Read()
 
-b, v = form.Read()
-
-exit(69)
+sys.exit(69)