Tooltip should appear if the mapped data is continuous

[alshan]

import random
from lets_plot import *

def get_points(n):
    random.seed(37)
    return dict(
        x = list(range(n)),
        v = [random.uniform(-.8, .9) for _ in range(n)]
    )

(ggplot(get_points(20), aes(x='x', fill='v')) +
     geom_tile() +
     scale_fill_brewer(palette='PRGn'))

No tooltip appear on tiles.

[alshan]

Batik example: https://github.com/JetBrains/lets-plot/blob/5c190d0badac8618715f683c5ff0f98c044b07c3/plot-demo/src/jvmBatikMain/kotlin/plotDemo/plotConfig/ScaleBrewerWithContinuousDataBatik.kt

[OLarionova-HORIS]

Fixed: b82ca3e