Don't allow the switch to a project that is already clocked-in

[Yaneida]

Currently, when we clock-in, the project selected is part of the list of projects to switch and update. If we accidentally switch to the project that is already clocked-in, a new entry will be created.

Task
Don't allow the switch to a project that is already clocked-in. See tsheets for ideas.

[enriquezrene]

This is a desired behavior