Set the default number of layers and current layer to 0. Now the layer view slider is empty while the initial slicing process is running.

Fixes CURA-1273 Layer number doesn't fit

plugins/LayerView/LayerView.py

@@ -34,8 +34,8 @@ class LayerView(View):
         self._layer_percentage = 0 # what percentage of layers need to be shown (SLider gives value between 0 - 100)
         self._proxy = LayerViewProxy.LayerViewProxy()
         self._controller.getScene().getRoot().childrenChanged.connect(self._onSceneChanged)
-        self._max_layers = 10
-        self._current_layer_num = 10
+        self._max_layers = 0
+        self._current_layer_num = 0
         self._current_layer_mesh = None
         self._current_layer_jumps = None
         self._top_layers_job = None