only requires Qt5 if interactive control cmake option is ON (#339)

Author: olivier-roussel

SoftRobotsConfig.cmake.in

@@ -13,7 +13,10 @@ find_package(Sofa.Component.Controller QUIET REQUIRED)
 find_package(Sofa.Component.SolidMechanics.Spring QUIET REQUIRED)
 find_package(Sofa.Component.Mapping QUIET REQUIRED)
 find_package(Sofa.Component.StateContainer QUIET REQUIRED)
-find_package(Qt5 QUIET REQUIRED COMPONENTS Network)
+
+if(SOFTROBOTS_INTERACTIVECONTROL)
+  find_package(Qt5 QUIET REQUIRED COMPONENTS Network)
+endif()
 
 if(SOFTROBOTS_HAVE_SOFAPYTHON)
     find_package(SofaPython QUIET REQUIRED)