reorder tool icons, add popup auto-hide after interaction

src/node_panel_brush.cpp

@@ -191,6 +191,10 @@ kEventResult NodePanelBrush::handle_event(Event* e)
 {
     switch (e->m_type)
     {
+    case kEventType::MouseLeave:
+        if (!m_interacted)
+            break;
+        // else fall through 
     case kEventType::MouseUpL:
         if (!m_mouse_inside)
         {
@@ -217,6 +221,7 @@ void NodePanelBrush::handle_click(Node* target)
     m_current->m_selected = true;
     if (on_brush_changed)
         on_brush_changed(this, m_container->get_child_index(target));
+    m_interacted = true;
 }
 
 int NodePanelBrush::find_brush(const std::string & name) const
@@ -330,6 +335,11 @@ bool NodePanelBrush::restore()
     return false;
 }
 
+void NodePanelBrush::added(Node* parent)
+{
+    m_interacted = false;
+}
+
 // -----------------------------------------------------------------------
 
 Node* NodeBrushPresetItem::clone_instantiate() const
@@ -426,6 +436,10 @@ kEventResult NodePanelBrushPreset::handle_event(Event* e)
 {
     switch (e->m_type)
     {
+    case kEventType::MouseLeave:
+        if (!m_interacted)
+            break;
+        // else fall through 
     case kEventType::MouseUpL:
         if (!m_mouse_inside)
         {
@@ -452,6 +466,7 @@ void NodePanelBrushPreset::handle_click(Node* target)
     m_current->m_selected = true;
     if (on_brush_changed)
         on_brush_changed(this, m_current->m_brush);
+    m_interacted = true;
 }
 
 bool NodePanelBrushPreset::save()
@@ -704,3 +719,8 @@ void NodePanelBrushPreset::add_brush(std::shared_ptr<Brush> brush)
     b->m_caption_size->set_text_format("%d", (int)brush->m_tip_size);
     b->on_click = std::bind(&NodePanelBrushPreset::handle_click, this, std::placeholders::_1);
 }
+
+void NodePanelBrushPreset::added(Node* parent)
+{
+    m_interacted = false;
+}