Option to make the list view more compact

## Prerequisites
- [x] I have searched open and closed issues for duplicates.

## Feature
**Problem**
When working with directories containing huge number of files (like a source check out from git etc) the huge space between items is a distraction and makes poor use of the screen real estate.

One could argue that for such use cases, a terminal would be more appropriate; but what about those addicted to nice GUIs from elementary (great work guys)!

**Solution**
Provide an option or an alternate view where the display is more compact.

* Can have tiny icons just enough to identify the file-type
* No thumbnails
* Option to have monospace font would also help (for huge directories with fixed-format filenames)

**Existing work**
Gmail offers a similar approach where it is possible to have the spaced out view (default config), but for those who prefer a compact view, there is an option for that too.

KDE's dolphin can be configured for a compact view.


**Describe alternatives you've considered**
* Switch back KDE, but not as nice over all.
* Use dolphin as a flatpak; dark theme doesn't seem to work.

**Additional context**
N/A