fix bugs on tps' indices

closes #261 (closed)

Calculate tps's indices from given time instead of searching for given time value on numpy array to fix bug give 1 addition to the five_minute_idx when given_time is in the middle of a five minute block.

closes #260 (closed)

Fix bug highlight wrong position for second tps' marker

Fix bug that give 1 addition to day_idx if click on the lower half of a five minute block.

Fix bug that gives error message when clicking on the area outside tps plot.