Insert parameter after selected row

[StephenNneji]

Closes #176

This PR adds row numbers to the project tables and the ability to add new entry after a selected row

Also changed the appearance of the cells in the Bayesian columns to indicate when they cannot be changed

[DrPaulSharp]

This looks good, there's just one thing I'd like you to have a look at. If you add a parameter after an intermediate row, the new parameter then appears to be selected. However, if you immediately add another parameter, it appears at the end of the list. Could you take a look at the appearance of a new parameter to make the fact it is not selected clearer.

[StephenNneji]

This looks good, there's just one thing I'd like you to have a look at. If you add a parameter after an intermediate row, the new parameter then appears to be selected. However, if you immediately add another parameter, it appears at the end of the list. Could you take a look at the appearance of a new parameter to make the fact it is not selected clearer.

The selected row should look like this

while the added row should look like

I think its very distinct, are you seeing something else?
I kept the invalid (grey) name highlight so its easier for the user to see where the param was added

[DrPaulSharp]

Ahh, somehow I hadn't noticed that in focussing on the bold parameter number on the left hand side. Ok, I'm less bothered now, but if it's easy to un-bold the new number I think it would be worth doing, but let me know what you think.

[StephenNneji]

Ahh, somehow I hadn't noticed that in focussing on the bold parameter number on the left hand side. Ok, I'm less bothered now, but if it's easy to un-bold the new number I think it would be worth doing, but let me know what you think.

I will investigate