qt_gui_core: 0.2.23-0 in 'indigo/distribution.yaml' [bloom]

Increasing version of package(s) in repository `qt_gui_core` to `0.2.23-0`:

- distro file: `indigo/distribution.yaml`
- bloom version: `0.5.5`
- previous version for package: `0.2.22-0`

## qt_dotgraph

```
* add support for edge coloring and changing of pen width
```

## qt_gui

```
* fix ToolBarArea type with PySide
```

## qt_gui_app

- No changes

## qt_gui_cpp

- No changes

## qt_gui_py_common

- No changes