[BUG] djangocms_picture output picture size as float, triggers warning in chrome

[TLuesebrinck]

In the 'srcset' and 'sizes' attribute of the img tag can contain float numbers.

This {{ picture_size.size.0}}w output the pixel size as 1366.0w which triggers this warning in chrome:

Failed parsing 'srcset' attribute value since its 'w' descriptor is invalid.

I solved this by using a float format filter to remove the decimal point:

{{ picture_size.size.0 | floatformat:"0" }}w

[fsbraun]

Hello @TLuesebrinck ! Thanks very much for the suggestion! Would you be interested in creating a pull request with a fix?