MOCCACAL-29: Selecting a color for the calendar should colorise the input

Because I figured it out that it works only if the input has the class 'procolor'. And I had to write the input tag by hand, in order for this to happen.  I couldn't make it just with CSS.
Actually, after retesting it, I saw that it works just by adding 'procolor' class, the inline style is useless.