Fixed issue #265 - Added error dialog box to Nimble to display sync erro...

...rs
First arg has to be the dialog type to use, like this: https://github.com/adobe/brackets/blob/790b3f2f02e68b0695ed03cd543cdbf92818e7b7/src/LiveDevelopment/LiveDevelopment.js#L1058

Second arg should be "MakeDrive Sync Error".