styling for title field; correct input target in tests; make download filename safer with default, max length; in playground index, correctly pass props through to gui container
* Remove unnecessary dev dependencies
* Use large range on true "dev" dependencies
The exact versions of these dependencies are not important for building, so give them large ranges in order to quiet down greenkeeper.
I did not split them between dependencies and devDependencies because a package's dependencies are installed whenever the package is installed as a dependency. Installing all of these would be obnoxious and unnecessary.