Workaround for multiple projects in same workspace

[ByK95]

I wanted to solve multiple ino files in same workspace , and wanted to resolve #839 could be assumed as workaround for #476 aswell.

• If workspace does not have sketch file defined
• In order to change current sketch clicking to status bar is enough which lists all posible sketches in workspace

it seemed easier to click a select a sketch rather than writing full path name.

[msftclas]

All CLA requirements met.

[adiazulay]

#1128 adds quick pick sketch selection