Fix theming, fix freeze when Calamares quits without reboot

CMakeLists.txt

@@ -58,7 +58,6 @@ install(PROGRAMS "scripts/change-system-language" DESTINATION libexec)
 install(PROGRAMS "scripts/lubuntu-installer" DESTINATION libexec)
 install(PROGRAMS "scripts/start-lubuntu-live-env" DESTINATION bin)
 install(FILES "lubuntu-live-environment.desktop" DESTINATION share/xsessions)
-install(CODE "execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink /etc/xdg/xdg-Lubuntu /etc/xdg/xdg-lubuntu-live-environment)")
 
 if(QT_VERSION_MAJOR EQUAL 6)
     qt_finalize_executable(lubuntu-installer-prompt)

scripts/lubuntu-installer

@@ -1,3 +1,3 @@
 #!/bin/bash
 
-pkexec calamares -D6
+sudo -E calamares -D6

scripts/start-lubuntu-live-env

@@ -1,11 +1,11 @@
 #!/bin/bash
 # Starts the Lubuntu Live Environment.
 
-openbox &
-sudo lubuntu-installer-prompt # This is intentionally *not* backgrounded.
-# If it exits...
 export XDG_CONFIG_DIRS="/etc/xdg/xdg-Lubuntu:"$XDG_CONFIG_DIRS
 export XDG_DATA_DIRS="/usr/share/Lubuntu:"$XDG_DATA_DIRS
 export DESKTOP_SESSION="Lubuntu"
+openbox &
+sudo lubuntu-installer-prompt # This is intentionally *not* backgrounded.
+# If it exits...
 killall openbox
 startlxqt

src/installerprompt.cpp

@@ -513,8 +513,7 @@ void InstallerPrompt::installLubuntu()
     calamares->start("/usr/libexec/lubuntu-installer", args);
 
     // If Calamares exits, it either crashed or the user cancelled the installation. Exit the installer prompt (and start LXQt).
-    connect(calamares, static_cast<void(QProcess::*)(int, QProcess::ExitStatus)>(&QProcess::finished),
-        this, [this](int, QProcess::ExitStatus){ this->tryLubuntu(); });
+    connect(calamares, SIGNAL(finished(int)), this, SLOT(tryLubuntu()));
 }
 
 InstallerPrompt::~InstallerPrompt()