[Home] Announcements cards expand even if there's nothing more to show to the user

### Description
Cards showing announcements in the mobile app expand on click, but when the announcement has a short text, the expanding is not necessary (and doesn't look nice).

### Test environment
Mobile

### Preconditions
Have the NGO make an announcement.

### Test Data
_not neccessary_

### Steps of Reproduction
_not neccessary_

### Expected Result
Card expands with the length of the text that must be displayed.

### Actual Result
See screenshot

### Notes (optional)

### Screenshots (optional)