UI optimization

Some of the elements of the UI are a bit confuse, like:
- on transactions, is difficult to see which one is pending or not (would be nice to display visually, like a “grayed” version, or a label indicating that is pending)
- on general, you use clickable icons on the graphics, but use the same style on the widgets icon. More than once I found my self trying to “click” the icons, then realizing is just for aesthestics
- If sidebar accounts you display the balance, why on categories you don't display the costs?