fix: item name format and capitalization

[pedrolamas]

Fluidd item names/labels format currently removes any non-letter/digit and adds spaces between then, which is incorrect.

The new approach works like this:

• Replace any _ with (single space)
• Split string by single space
• Remove any empty entry (resulted from multiple consecutive spaces)
• Capitalize the first letter of each part of the splited string
• Join the result, separating the items with a single space

Before

After

Fixes #1460