Exper

A minor modification to parsing the region user input. I noticed that upon first load "chr1:0" is in the region text box and so I attempted to visit "chr16:48000281" which showed no bases, while "16:48000281" showed me some bam. To fix this, I added a regular expression to parse the input and remove any leading non-digit characters, space and also added some more splitting characters just incase.