Have command line use InputBox

Is your feature request related to a problem? Please describe.
When I press : to enter ex-mode and start typing a command, it takes a while for my eyes to scan for the location of the command. I've been using VSCodeVim for several weeks and this doesn't seem to be improving. The status bar is too small and too out of the way and the visual change is not strong enough to draw my eyes to it.

Furthermore, the cursor position is emulated in the status bar. It just looks weird and has been the subject of a few bugs.

Describe the solution you'd like
I'd like it to be way more obvious that I'm typing a command. The input for command palette is ideal; it's large, appears at the top, has borders, is an intuitive place to look. It's also modal, so cannot be affected by other plugins listening to key events.

Vim's command input was actually below the status bar, so it's not like VSCodeVim is properly emulating it anyway (though understandably so). Although I think something better should be the default, I also realise I'm fairly strongly opinionated, so would happily accept an option to change it.

Start by locating the existing ex-mode command input and reviewing how the extension currently renders it in the status bar. Compare that flow with the VS Code command palette/InputBox behavior described in the issue, then define the replacement or configuration option and verify that command entry is modal and visually prominent.