[advancedConfig] start input with default value
Merge pull request #1639 from spenceralger/advanced_editting

Improve ux when editing advanced config default
disable cache busting if we don't have the build number
[grunt] added 'run_build' task
open date format docs in new tab/window
[grunt] open the browser after build started
Merge branch 'grunt_run_build'
[indices] reset defaults before fetching samples