Windows support

Main.py

@@ -4,7 +4,9 @@ The window and navigation; each page lives in its own *Page.py."""
 import flet as ft
 
 from BrowsePage import BrowsePage
-from Core import AppName, ApplyAppearance, AssetsDir, BuildTheme, BundledFontFamily, EffectiveSettings, LoadConfig, Palette
+from Core import (
+    AppName, ApplyAppearance, AssetsDir, BuildTheme, BundledFontFamily, EffectiveSettings, IsWindows, LoadConfig, Palette,
+)
 from LexiconsPage import LexiconsPage
 from LibrariesPage import LibrariesPage
 from Library import TagCore
@@ -40,6 +42,8 @@ def Main(Page: ft.Page) -> None:
     Page.bgcolor = Palette.Base
     Page.window.width = 1280
     Page.window.height = 820
+    if IsWindows:
+        Page.window.icon = str(AssetsDir / "Icon.ico")  # taskbar/title bar (Linux: the desktop entry)
     Page.window.min_width = 900
     Page.window.min_height = 560