Add a new utility function for scrolling elements into view with the
same, consistent options, and use it for both the new channel scrolling
behavior and the existing userlist scroll code.
Implements & resolves#2062
Add Op specific actions to contextMenu
Show context menu when left clicking user
Switch to using data attributes as selectors
remove ban as possible action
Move `isOpInChannel()` to utils.js
Capitalize strings
use CSS.escape for `ownNick`
use string interpolation
properly point to findCurrentNetworkChan
Move context menu item actions to command pattern
add icons for context menu actions
Make list in context menu always list.
remove empty lines in style.css
use info circle instead of question circle
change context menu labels.
change contextMenuActions.execute to more explicit method.
Since the introduction of infinite scrolling, `/clear` is now broken. As far as I can tell, there is no way to reproduce something decent (and working!) without drastically changing its behavior from "hide the messages in current channel" to "permanently destroy all messages in memory in the current channel", which is not a great change to introduce sneakily 😂.
The code for this was very trivial, so removing it now until there is a better way to do so, if this is ever possible.
Also, `/clear` was not even autocompleted, sooo...
