Create an inspector panel to configure stuff

[lorentey]

Putting a bunch of toggles in the View menu works, but it would be better to build an inspector panel to hold these options:

• Toggling between linear/logarithmic scale on either axis
• Toggling between displaying amortized/raw measurements
• Selecting the time and size scale shown on the chart (Issue Let the user zoom in/out on a specific area on the chart #2)
• Selecting the current theme
• Controlling the position of the legend (also, show/hide it) (Issue Custom position for the legend #5)
• Setting the order of benchmark tasks
• Changing the curve color/thickness/dashing of an individual benchmark task
• etc.

There should be a button on the toolbar to show/hide the inspector.

[lorentey]

This has been mostly resolved in Attabench 2