Add Title Format property to control how the title on the button is formatted

[HughMacdonald]

This PR adds a new multi-line text property, Title Format, which contains details of how the title should be formatted on the button. It supports a number of different replacement values:

• {projectName} : The project name
• {taskName} : The task name
• {timerName} : The timer name
• {timer} : The current timer value when running. Blank when not running

It defaults to:

{projectName}:
{taskName}
{timer}

which is the original default title (if the timer name is not set).

With this setup, it's impossible to replicate the previous behavour exactly, where if timerName was set, this would replace the title.

Resolves #9

[HughMacdonald]

Sounds good - will address all comments

[HughMacdonald]

Changed made. I didn't change the version of the plugin, as I didn't know how you like to deal with that

[eXpl0it3r]

Works like a charm! Thanks for putting this together. 🙂

I also really like the advanced features marking 👌