Add new filtering category to the Logger: popups

[peace2000]

### Prerequisites

• I verified that this is not a filter issue
• This is not a support issue or a question
• I performed a cursory search of the issue tracker to avoid opening a duplicate issue
  • Your issue may already be reported.
• I tried to reproduce the issue when...
  • uBlock Origin is the only extension
  • uBlock Origin with default lists/settings
  • using a new, unmodified browser profile
• I am running the latest version of uBlock Origin
• I checked the documentation to understand that the issue I report is not a normal behavior

### Description

Hi, can you add a new filtering category to the Logger that would filter popups?

[gwarser]

You can always type |popup in filtering input box. https://github.com/uBlockOrigin/uBlock-issues/wiki/The-logger#filtering-the-logger-output

Do you see popups so often that shortcut is needed?

[gorhill]

There is also other as a filter option.

Edit: ok other wouldn't show popup type, I can fix this though.

[peace2000]

@gwarser Not necessarily, but I thought there is no reason not to have it.

@gorhill Ok, thanks. Great.