remove obsolete styles for standalone PWA to fix colors

src/ViewModel/Global/coreViewModel.ts

@@ -7,7 +7,7 @@ import ChatListModel from "../../Model/Chat/chatListModel";
 import FileTransferModel from "../../Model/Global/fileTransferModel";
 
 export default class CoreViewModel {
-    readonly BUILD = "Build 26.04.09.B";
+    readonly BUILD = "Build 26.04.09.C";
 
     translations: Translations;
 

src/colors.css

@@ -101,12 +101,6 @@ body[theme="dark"] [color]:not([color="standard"]).subtle-background {
     --luma: var(--subtle-luma-dark);
 }
 
-@media (display-mode: standalone) {
-    [color]:not([color="standard"]).subtle-background {
-        --luma: 0%;
-    }
-}
-
 /* definitions */
 [color="coral"] {
     --hue: 20;