Fix DLG camera angle selection

There are seven Camera angles and they start from 0, so this check is incorrect: ```python elif node.camera_id == -1 and self.ui.cameraAngleSelect.currentIndex() == 6: self.ui.cameraAngleSelect.setCurrentIndex(0) ``` should be checking if it's == 7, or better yet check if it's greater than 7. Not sure why this check exists in the first place but w/e Without this change it's impossible to select 'Static Camera'