ask for " button close "

[bgbruno]

issue

I open panel with " float button " then naturaly I want close panel - BUT there is no " close button " also " float button " interferes unnecessarily with opened panel

solution

natural standard way is - if is panel " closable " then close it with button " x "

1. after click into " float button " hide " float button " and " open panel "
2. in " opened panel " show " close button " on " right top "
3. after " close panel " with " close button " show " float button " again

[bgbruno]

more info in #366