Better UI arrangement

[bilogic]

1. The red box is hard to read because of the scroll bar, if its purpose is to indicate unstaged/uncommited changes, why not have a top row in the graph and title it Uncommitted changes?
2. The green boxes are basically drop downs, why not place them beside the purple box and indicate clearly Repo and Branch?
3. History... could be like a browser's forward and backward button
4. With the 3 gone, there is no need for the header section, giving more space for a bottom Details-panel-position