Handle long variable values better
Description
I've got a project variable, GCLOUD_SERVICE_KEY
; it's base64 encoded, very long, and has no spaces. When displayed in the web UI, it causes the page width to expand to fit the variable length, which means there's miles of horizontal scrolling.
Proposal
We should hide variable values by default, and only show them when explicitly clicked on. This avoids people accidentally exposing sensitive variables when someone is watching over their shoulder, screencasting, etc. Barring that, we should truncate really long variables, and only expand them on click, or even just go to edit them to show the full values.