Update CMakeLists.txt : tray_manager compatibility

Author: iqzer0

linux/CMakeLists.txt

@@ -42,6 +42,8 @@ endif()
 function(APPLY_STANDARD_SETTINGS TARGET)
   target_compile_features(${TARGET} PUBLIC cxx_std_14)
   target_compile_options(${TARGET} PRIVATE -Wall -Werror)
+  # Allow deprecated declarations for tray_manager compatibility
+  target_compile_options(${TARGET} PRIVATE -Wno-error=deprecated-declarations)
   target_compile_options(${TARGET} PRIVATE "$<$<NOT:$<CONFIG:Debug>>:-O3>")
   target_compile_definitions(${TARGET} PRIVATE "$<$<NOT:$<CONFIG:Debug>>:NDEBUG>")
 endfunction()