More markup around JB's container for correct height calculation.

JB's height calculation was slightly messed up after we moved the toolbar
around recently.

Signed-off-by: Anurag Priyam <anurag08priyam@gmail.com>
Add button to toggle track labels.

Signed-off-by: Vivek Rai <vivekraiiitkgp@gmail.com>
Make search track deletable

Any track can now be made deletable by adding {deletable: true} to
track config.

Signed-off-by: Vivek Rai <vivekraiiitkgp@gmail.com>
Use tolerance = pointer for dnd to edit track.

close #65

Signed-off-by: Anurag Priyam <anurag08priyam@gmail.com>
Replace JB's sequence search box with Bootstrap modal.

Sequence search box is now replaced with feature rich modals provided by
Bootstrap. Modals retain the search params and selections which is quite
handy when making quick searches, are easy to dismiss, and go with the
overall apperance of afra.

We also add a couple of handy feature to search modal like search on
'Enter' key press, and autofocus search area.

Signed-off-by: Vivek Rai <vivekraiiitkgp@gmail.com>
Add a page unload warning message.

Also, inform user in case he attempts to close window after curation
but done button has failed.

Signed-off-by: Vivek Rai <vivekraiiitkgp@gmail.com>