TCF Agent: Run Control: better support of native "step over"

If back end supports native step over, use it to implement step over line and step over range.
diff --git a/agent/tcf/services/runctrl.c b/agent/tcf/services/runctrl.c
index e453af0..81322b8 100644
--- a/agent/tcf/services/runctrl.c
+++ b/agent/tcf/services/runctrl.c
@@ -2099,12 +2099,14 @@
         if (context_can_resume(ctx, ext->step_continue_mode = RM_STEP_INTO)) return 0;
         break;
     case RM_STEP_OVER_RANGE:
+        if (context_can_resume(ctx, ext->step_continue_mode = RM_STEP_OVER)) return 0;
         if (context_can_resume(ctx, ext->step_continue_mode = RM_STEP_INTO_RANGE)) return 0;
         break;
     case RM_REVERSE_STEP_OVER:
         if (context_can_resume(ctx, ext->step_continue_mode = RM_REVERSE_STEP_INTO)) return 0;
         break;
     case RM_REVERSE_STEP_OVER_RANGE:
+        if (context_can_resume(ctx, ext->step_continue_mode = RM_REVERSE_STEP_OVER)) return 0;
         if (context_can_resume(ctx, ext->step_continue_mode = RM_REVERSE_STEP_INTO_RANGE)) return 0;
         break;
     case RM_SKIP_PROLOGUE: