Use the following to run KeePassXC with the icons from the
source code, ignoring the operating system's Qt icon theme:
```
KEEPASSXC_IGNORE_ICON_THEME=1 keepassxc
```
The patch further adds a script `makeicons.sh` that re-creates KeePassXC
icons from the Material Design icon set and can be used for easily
updating icons in the future. Instructions are in the script.
Fixes#475
- Use proper model for database and session in settings page
- Fix button text (unlock/lock) not changed according to the database locking status
- Fix button icons not present on icon themes other than Breeze
- Fix the disconnect button may got clipped when new session opens