show list of environments in a popup menu
peek at any environment using the environment selector
show name of currently selected environment as the popup trigger
refresh the environment list when packages are attached and detached from the search path
show environment chain above global environment when debugging (not yet selectable)
Merge remote-tracking branch 'origin/master' into feature/environment-selector
make function-local environments selectable while debugging
fix bugs around R restart and scroll position
make display of call frames in environment selector consistent
clarify warning from clear all
Merge remote-tracking branch 'origin/master' into feature/environment-selector
hide internal environments; make display for unevaluated promises more accurate
Merge remote-tracking branch 'origin/master' into feature/environment-selector

Conflicts:
	src/gwt/src/org/rstudio/studio/client/workbench/views/environment/view/EnvironmentObjects.css
remember monitored environment on suspend/resume
add session overlay for cmake
add session profile filter
void return type for profile filter
only set platform gui when we need to
tweak environment name display, make simple.list objects expandable
tweak expired page