Add install plugin menu to project level
Add install plugin menu to project level

Adds the "install Cordova plug-in" menu item to Thym project types in
addition to plugins folder.

Signed-off-by: Gorkem Ercan <401a00c042ea0ce3e74815aa3e2dca472ed1e2f8@gmail.com>
kaloyan-raev/thym,eclipse/thym,alexeykazakov/thym,vasuki1996/thym,gorkem/thym,patricmutwiri/thym,reilove/thym,eclipse/thym,vasuki1996/thym,paulvi/thym,massimiliano76/thym,psrna/thym,patricmutwiri/thym,kaloyan-raev/thym,psrna/thym,alexeykazakov/thym,psrna/thym,patricmutwiri/thym,paulvi/thym,reilove/thym,gorkem/thym,massimiliano76/thym,vasuki1996/thym,massimiliano76/thym,alexeykazakov/thym,eclipse/thym,paulvi/thym,gorkem/thym