Better visualisation of timeline data input control

In 2.0 when user selects a data input to control the timeline of the animation, this change is only reflected by having a reddish text label appear in the timeline toolbar and by changing the title of the timeline palette to red. A more visual indication is needed.

One option is shown in the attached screenshot, where a reddish (data input colored) bar is shown to visualise which timeline area the data input values are mapped to and the label/name of the data input is shown there (where we also have more width to show even longer names for data inputs).