Label formatting of the tree

1. Open a tree
2. Select a node
3. Click 'Formatting' button on the toolbar
   Expected state: Label Formatting dialog appears, it shows current settings
4. Change settings, e.g. set the color to red, and click Ok
   Expected state: all labels of the node sub-tree are red
5. Select another node that is not red
6. Click 'Formatting' button on the toolbar
   Expected state: Label Formatting dialog with the current settings appears
   Current state: Label Formatting dialog appears with the settings from the step 4
7. Accept the dialog without any change
   Expected state: the settings from the dialog are applied to the sub-tree
   Current state: nothing happens

Probably Label Formatting should be applied to ALL labels of the tree, until UGENE-600 is fixed.

Another scenario:

1. Select a node
2. Change label formatting – set color to green
   Current state: the labels of selected sub-tree are green
3. Click Collapse button on the toolbar
4. Change label formatting – set color to yellow
   Current state: visible selected label is yellow
5. Click Expand button on the toolbar
   Current state: the labels of the collapsed and expanded sub-tree are not green
   Expected state: labels in collapsed sub-tree should also become yellow (selection of the node is the same in steps 2 and 4, but the behavior is different)