issue #26: Change widget position

[nd0nd0]

From a UX point of view, it is recommended to keep chat icons on the bottom right corner of your website, as this is a familiar and usual spot where people naturally notice and navigate.

However, UX is subjective. This PR addresses #26

I would recommend the WA button to have a high contrast background #5ad167 and the WA chat icon in white in light mode situations and vice versa --> issue #27