doc: Updated some GUI API docs (2)
doc: Updated some GUI API docs (2)

andersevenrud/OS.js-v2,omet-ca/omet-desktop,Rxswyers/OS.js,salman-kamkoriwala/OsJsSample,omet-ca/omet-desktop,andersevenrud/OS.js-v2,andersevenrud/OS.js-v2,omet-ca/omet-desktop,salman-kamkoriwala/OsJsSample,omet-ca/omet-desktop,salman-kamkoriwala/OsJsSample,salman-kamkoriwala/OsJsSample,andersevenrud/OS.js-v2,Rxswyers/OS.js,omet-ca/omet-desktop,Rxswyers/OS.js,andersevenrud/OS.js-v2,Rxswyers/OS.js,Rxswyers/OS.js,salman-kamkoriwala/OsJsSample