Fixed issue #743

Mouse cursor retained in the Search text box after obtaining the Search results
creating new cell with selected language
Merge branch 'develop' into insert-lang-cell
Merge branch 'develop' into search_backspace_focus
artifacts
Merge branch 'pr/805' into develop

Conflicts:
	htdocs/js/rcloud_bundle.min.js
propagate file upload errors

any error or refusing an overwrite should cancel the rest
rejections should propagate out of RCloud.UI.upload_with_alerts
specifically discard rejections in RCloud's use of RCloud.UI.upload_with_alerts
because the errors have already been printed to the file upload panel
fixes #790

Added the check for button enabled or not for editing in read-only mode.
Merge pull request #806 from amol-jore/insert-lang-cell

Fixed #790 insert cell based on language of next cell
the last hardcoded upload ui selector?

gee i sure hope so.
Merge branch 'develop' of https://github.com/att/rcloud into develop
artifacts