fix layer delete order bug, fix and improve brush preview during the stroke, fix windows mouse capture (api works only on the main thread)

src/hmd.h

@@ -23,7 +23,7 @@ struct Controller
     int index = 0;
     bool active = false;
     std::map<uint64_t, bool> buttons;
-    std::map<uint8_t, float> buttons_axis;
+    std::map<uint8_t, bool> buttons_axis;
     uint64_t buttons_bits{ 0 };
     glm::vec2 axis[5];
     glm::mat4 xform{ 1 };