fix polygon selection and add steam deploy script

src/canvas_modes.cpp

@@ -706,7 +706,7 @@ void CanvasModeMaskLine::leave(kCanvasMode next)
 {
     if (next != kCanvasMode::Draw && next != kCanvasMode::Erase && next != kCanvasMode::Line)
     {
-        m_points2d.clear();
+        m_points.clear();
         m_active_tool = false;
         Canvas::I->m_smask_active = false;
     }
@@ -1355,6 +1355,7 @@ void CanvasModeTransform::leave(kCanvasMode next)
     layer->optimize();
     //auto m = static_cast<CanvasModeMaskFree*>(Canvas::I->modes[(int)kCanvasMode::MaskFree][0]);
     //m->clear();
+    Canvas::I->draw_merge();
 }
 
 void CanvasModeTransform::on_Draw(const glm::mat4& ortho, const glm::mat4& proj, const glm::mat4& camera)