* make drawer state unique to species instance

* fix drawer not closing when clicked on browser tab and browser image

* make selectors return the genome specific values for drawer and some browser specific state properties

* fix thunk type in drawer actions

* refactor drawer state returned in reducer

* fix wrong drawer open check in 4b8ec1b5

* make more changes as suggested in code review

* fix wrong thunk dispatch type in track panel actions

* fix wrong value returned for selectedBrowserTab

* remove unnecessary calc method

* fix wrong value returned for selectedBrowserTab

* fix correct track not being highlighted on selection

* fix undefined returned by drawer selector

* change drawerViewForGenome to drawerView to be more relevant

* use calc for getting the browser width rather than 41px (needs to be in the same format as other width values)

* fix broken test cases

* add a comment that tells about the need for the calc format for browser animation

* use the ChrLocations replacing the genome ChrLocation object type

* use classname to append class names instead of manually doing it

* create closeDrawer action as it is used in many places within the browser

* batch multiple dispatches in drawer actions

* fix key type of TrackItemColour enum