Introduce class for severity title page indicator to enable styling via a custom item in themes.
Refactoring.
Extract list widgets’ styles.
Replace utility classes with attributes.
Set default text color in theme.
Extracted lots of style attributes.
Fix action bar overflow menu text color.
Refactoring; preparations for second theme.
First version of dark theme.
Refs #25.
Fix border in applications fragment.
Fix host list padding in landscape mode.
Fix overlapping border in list fragments.
Import all history details from Zabbix, not just every 20th value.
Fix text color for graphs on dark theme.
Refs #25.
Add preference option for switching themes.
Refs #25.
Handle preference changes (esp. for themes).
Closes #25.