Better visualisation of slide 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 bottom of the slide palette and changing the title of slide 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 next to slides that the slides are controlled with data input. The data input icon and name of the of the data input is shown there (where we also have more width to show even longer names for data inputs).