ui feature: app 'downloading...' and 'installing...' modals are confusing

[jurij-jukic]

Is your feature request related to a problem? Please describe.

When I download or install an app, there is a modal which pops up. At first I wasn't sure if the download will continue if I click 'X', so I was reluctant.

Describe the solution you'd like

For example, instead of using a modal, this button 'Download' could just say 'Downloading...'

This button here could also say 'Downloading...':

And analogously for installs,
here:

and here:

[0x70b1a5]

#372