fix: Temporarily use Xpra beta

remote/Dockerfile

@@ -33,7 +33,7 @@ ARG XPRA_REGISTRY=https://xpra.org
 
 # Install xpra and dependencies
 RUN wget -qO /usr/share/keyrings/xpra.asc ${XPRA_REGISTRY}/xpra.asc && \
-    wget -qO /etc/apt/sources.list.d/xpra.sources https://raw.githubusercontent.com/Xpra-org/xpra/master/packaging/repos/bookworm/xpra.sources && \
+    wget -qO /etc/apt/sources.list.d/xpra.sources https://raw.githubusercontent.com/Xpra-org/xpra/master/packaging/repos/bookworm/xpra-beta.sources && \
     sed -i "s|https://xpra.org|${XPRA_REGISTRY}|" /etc/apt/sources.list.d/xpra.sources && \
     apt-get update && \
     apt-get install -y \
@@ -45,13 +45,6 @@ RUN wget -qO /usr/share/keyrings/xpra.asc ${XPRA_REGISTRY}/xpra.asc && \
         nginx && \
     rm -rf /var/lib/apt/lists/*
 
-# Inject script to force focus on modal windows in xpra client
-# and remove the compressed index.html files because they don't contain our fix
-COPY client-inject.js /tmp/client-inject.js
-RUN sed -i -e '/load_default_settings();/i\\' -e '/load_default_settings();/e cat /tmp/client-inject.js' /usr/share/xpra/www/index.html \
-&& rm /usr/share/xpra/www/index.html.gz \
-&& rm /usr/share/xpra/www/index.html.br
-
 COPY rc.xml /etc/xdg/openbox/rc.xml
 COPY menu.xml /etc/xdg/openbox/menu.xml