This is a quick Chrome browser extension I developed that adds the vim keymap, monokai theme, and ctrl+s or :w saving functionality within code mirror inputs throughout the ServiceNow platform.
v0.0.4 - Added ctrl+s detection for saving UI Scripts
v0.0.5 - Added ctrl+s saving for (hopefully) all codemirror instances
v0.0.6 - Inject jQuery when not present (for the debugger in Istanbul)
v0.0.7 - Added breakpoint highlighting to the monokai theme
v0.0.8 - Configurable to use tabs/spaces and enable/disable vim keymap