Implement autoconfig for LXQt DE

Author: mominul

src/frontend/PlatformConfig.cpp

@@ -523,6 +523,13 @@ void setupBudgieIME() {
     setupFcitx5InputMethod();
 }
 
+void setupLXQtIME() {
+    configureImConfigForFcitx5();
+    setFcitx5EnvVarsForSession();
+    startFcitx5IfNeeded();
+    setupFcitx5InputMethod();
+}
+
 void setupInputSources() {
     auto de = detectDesktopEnvironment();
 
@@ -540,6 +547,8 @@ void setupInputSources() {
         setupMateIME();
     } else if(de == DesktopEnvironment::Budgie) {
         setupBudgieIME();
+    } else if(de == DesktopEnvironment::LXQt) {
+        setupLXQtIME();
     } else if(de == DesktopEnvironment::macOS) {
         #ifdef Q_OS_MACOS
             bool enabled = macOS::getInputSourceEnabled();