Simple UI updates

[davidferlay]

Observed

1. Header title is capitalized by styles, preventing user config to use lower case characters
2. Projet name in root bubble is aligned to left
3. Width of root bubble is not dynamic / related to label length

Expected

• Header title should not be capitalized by styles, to let user ability to use lower case characters
• Projet name in root bubble should be centered
• Width of root bubble should be dynamic / related to label length