Stop keyup events for Issue 733
Merge pull request #978 from tejohnso/master

Stop keyup events from passing to the browser
Add comments as to why we should stop propagating the keyup event
Add closeTabsToLeft, closeTabsToRight and closeOtherTabs commands
Merge pull request #1129 from mrmr1993/closeOtherTabs

Add closeTabsToLeft, closeTabsToRight and closeOtherTabs commands
Add noRepeat to relevent frontend commands

The use of Vomnibar commands with a numerical prefix > 1 is broken and
non-trivial to fix. This patch introduces the `noRepeat` property for
frontend commands, applying it to all Vomnibar commands and several
others.
Prompt for confirmation when executing large numbers of repeats

Implement `repeatLimit`, to prompt for confirmation before repeating a
command a large number of times, and apply it to tab creation/deletion
commands.