remove sidebar and make panels popup

src/node_panel_color.cpp

@@ -53,6 +53,26 @@ void NodePanelColor::set_color(glm::vec3 rgb)
     m_base_color = glm::vec4(rgb, 1);
 }
 
+kEventResult NodePanelColor::handle_event(Event* e)
+{
+    switch (e->m_type)
+    {
+    case kEventType::MouseUpL:
+        if (!m_mouse_inside)
+        {
+            mouse_release();
+            parent->remove_child(this);
+            if (on_popup_close)
+                on_popup_close(this);
+        }
+        break;
+    default:
+        return kEventResult::Available;
+        break;
+    }
+    return kEventResult::Available;
+}
+
 void NodePanelColor::added(Node* parent)
 {
     set_color(Canvas::I->m_current_brush->m_tip_color);