Hide all texts from View menu

Quick test,… works well.

UI.menu('View').add_item UI::Command::new('Text') {
  opts = Sketchup::active_model.rendering_options
  opts['DisplayText']= !opts['DisplayText']
}.set_validation_proc {
  Sketchup::active_model.rendering_options['DisplayText'] ? MF_CHECKED : MF_UNCHECKED
}

UI.menu('View').add_item UI::Command::new('Dimensions') {
  opts = Sketchup::active_model.rendering_options
  opts['DisplayDims']= !opts['DisplayDims']
}.set_validation_proc {
  Sketchup::active_model.rendering_options['DisplayDims'] ? MF_CHECKED : MF_UNCHECKED
}