Hardcode single default CSS - breaking change

- Themes likely broken at this point
- Break existing use of inline CSS

webapp_utils.py

@@ -531,8 +531,10 @@ def htmlHeaderWithExternalStyle(cssFilename: str, lang='en') -> str:
     if fontName:
         htmlStr += '    <link rel="preload" as="font" type="' + \
             fontFormat + '" href="' + fontName + '" crossorigin>\n'
-    cssFile = '/' + cssFilename.split('/')[-1]
-    htmlStr += '    <link rel="stylesheet" href="' + cssFile + '">\n'
+    cssFile = cssFilename.split('/')[-1]
+    # TODO: Clean up - default load only one base css file
+    htmlStr += '    <link rel="stylesheet" href="base.css">\n'
+    #htmlStr += '    <link rel="stylesheet" href="' + cssFile + '">\n'
     htmlStr += '    <link rel="manifest" href="/manifest.json">\n'
     htmlStr += '    <meta name="theme-color" content="grey">\n'
     htmlStr += '    <title>Epicyon</title>\n'