If stylesheet files are named with 2 extensions, the first extension is
used as the context argument when the package’s stylesheets are loaded.
This allows people to target the text editor by naming their stylesheet
`index.atom-text-editor.less`.
Previously I used CSS specificity to order the most specific / recently
added menu items for a given element *first* when building up the
context menu. When a duplicate label was found for a given menu I would
refrain from inserting it. Now instead I order things the opposite way.
The most specific / recently added items come later and items with the
same label are clobbered by later items.
Commands registered with the command registry will always be handled
first, so as long as we disable any listeners in the registry that were
already invoked for the current command, we don’t need to disable jQuery
methods before replaying the command after activating the package.
This commit adds the ability to call .disableInvokedListeners on the
event passed to the command listeners. This returns a function which
can be called to reenable them.
* Activation events can be handled via atom.commands
* Pre-existing listeners registered via atom.commands are disabled when
replaying events for the activated package.
