Support aggregators with multiple parameters (i.e. percentile)

[eatlakson]

Describe the bug
Extra parameters are not detected for aggregators - such as percentile.

To Reproduce
Add a literal column with a "percentile(columns_name, p_value)" value. Current regex does not detect or extrect p_value, and it is not added to the summarize section.

Expected behavior
percentile literal column is added to the summarize section with the p_value value defined.

Screenshots
n/a

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
Will follow up with PR.