Fix left mouse doesn't select if select mouse set to left

[NathanLovato]

Fixed, and added the shortcut profile in the utils folder - it's small enough and until the register keymap function is ready it's more convenient to use than a github gist https://github.com/GDquest/Blender-power-sequencer/commit/88cfe796bc58f171e5e2106cb5eac595cda15989