Improve user experience of buttons on front page

[anetteu]

Describe the improvement you would like to see
The button for opening, cancelling and pausing an ongoing mission on iPhone/small screen are very small and close to each other (marked with red in screenshot). Can be difficult to operate on iPhone in field with gloves etc.

How will this change existing functionality?
Separate buttons. I think the entire mission box was the button the enter the mission page earlier (marked with blue in screenshot)?

How will this improvement affect the current Threat Model?
Leave blank for maintainers to fill out if you are uncertain about this.