Bug 492738

SUMMARY
Several consecutive newlines are collapsed into one

STEPS TO REPRODUCE
1. Send the following message:
```
a
b

c
```

OBSERVED RESULT
The message is rendered as:
```
a
b
c
```

EXPECTED RESULT
The message should've been rendered as:
```
a
b

c
```

SOFTWARE/OS VERSIONS
KDE Frameworks Version: 6.5.0
Qt Version: 6.7.2

ADDITIONAL INFORMATION
Interestingly, right-clicking on the message shows the following context menu item:
```
Search for 'a

b
c'
```

nheko renders the message as intended (see EXPECTED RESULT), but Element Android renders it as:
```
a

b


c
```