File selector widget

[rossant]

• Modal window
• Browsing server-side files
• Bind it to the JS code that launches the app

[cgestes]

implemented a simple solution. where you can choose between a list of kwik files.

I think of the following solutions to find the kwik files:
"~/.config/phy/data_folder" define the list of folders containing kwik files, then we scan them when importing phy or phyui.

screenshot of the current version: