sim: VSIN - allow user to specify a phase

TD is not the same as PHASE.
TD is the delay before the source turns on.
PHASE is ... the phase

If only TD is set, the signal starts later, but the phase is still 0 when compared to the t=0 of the simulation.

eeschema/sim/sim_model_source.cpp

@@ -400,15 +400,13 @@ std::vector<SIM_MODEL::PARAM::INFO> SIM_MODEL_SOURCE::makeSinParamInfos( std::st
     paramInfo.description = "Damping factor";
     paramInfos.push_back( paramInfo );
 
-    // "phase" is not needed. "td" is enough.
-
-    /*paramInfo.name = "phase";
+    paramInfo.name = "phase";
     paramInfo.type = SIM_VALUE::TYPE_FLOAT;
     paramInfo.unit = "°";
     paramInfo.category = SIM_MODEL::PARAM::CATEGORY::PRINCIPAL;
     paramInfo.defaultValue = "0";
     paramInfo.description = "Phase";
-    paramInfos.push_back( paramInfo );*/
+    paramInfos.push_back( paramInfo );
 
     appendAcParamInfos( paramInfos, aUnit );
     return paramInfos;