A new Kapow release!

And another project rises from the ashes like a phoenix: I have finally made a new feature release of Kapow, version 1.5.0! There are not a whole lot of user-visible changes, but some very important code cleanup happened. The most noticeable changes are that you can now start, stop, or cancel sessions by right-clicking on the sidebar. It also prevents you from removing a project that has a timer running in a subproject. Enjoy!