Reworked the look and feel preivew, browser, new table simulation with arrow keyskkkkkkkkkk

DemoPrograms/Demo_Look_And_Feel_Theme_Dump.py

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+import PySimpleGUI as sg; web=False
+# import PySimpleGUIWeb as sg; web=True
+# import PySimpleGUIQT as sg; web=False
+
+"""
+    If you're using the PySimpleGUI color themes, then your code will a line that looks something like this:
+        sg.change_look_and_feel('Light Green 1') or sg.change_look_and_feel('LightGreen1')
+"""
+
+# Use the built-in Theme Viewer to show all of the themes and their names
+sg.preview_all_look_and_feel_themes()
+
+# The remainder of the program duplicates the built-in Theme Viewer, allowing you to create your
+# own custom theme viewer window.  You can configure the number of frames per row for example. Or maybe you only
+# want to see the dark themes
+
+WINDOW_BACKGROUND = 'lightblue'
+web = False
+
+sg.change_look_and_feel('Default')
+
+def sample_layout():
+    return [[sg.Text('Text element'), sg.InputText('Input data here', size=(15, 1))],
+            [sg.Button('Ok'), sg.Button('Cancel'), sg.Slider((1, 10), orientation='h', size=(10, 15))]]
+
+
+layout = [[sg.Text('List of Themes Provided by PySimpleGUI', font='Default 18', background_color=WINDOW_BACKGROUND)]]
+
+FRAMES_PER_ROW = 9
+names = sg.list_of_look_and_feel_values()
+names.sort()
+row = []
+for count, theme in enumerate(names):
+    sg.change_look_and_feel(theme)
+    if not count % FRAMES_PER_ROW:
+        layout += [row]
+        row = []
+    row += [sg.Frame(theme, sample_layout() if not web else [[sg.T(theme)]] + sample_layout())]
+if row:
+    layout += [row]
+
+window = sg.Window('Custom Preview of Themes', layout, background_color=WINDOW_BACKGROUND)
+window.read()
+window.close()
+del window