Reflect selected view on the side panel
We should somehow show selected view in the side panel. Easiest would be to set font to bold on the corresponding button. However, a better solution would be to also highlight selected section through raising the corresponding button. Thus, when Projects is selected, we will hide gel list and project selector under Gels, add vspace filler under Projects and set projects to bold. Also, when looking at the images of a gel, corresponding gel should be highlighted in the tree on the left. That assuming that it is not filtered out through project. Note that the transitions should use animations.