Merge pull request gridstack#1878 from adumesny/master

rev 4.3.1

Merge pull request gridstack#1871 from adumesny/master

rev 4.3.0

Merge pull request gridstack#1870 from adumesny/master

4.3 rev

Merge pull request gridstack#1848 from adumesny/master

rev 4.2.7

Merge pull request gridstack#1810 from adumesny/master

rev 4.2.6

Merge pull request gridstack#1773 from adumesny/master

JQ droppable fix for website

Merge pull request gridstack#1770 from adumesny/master

v4.2.4

Merge pull request gridstack#1753 from adumesny/master

rev 4.2.3

Merge pull request gridstack#1742 from adumesny/master

v4.2.2

Merge pull request gridstack#1735 from adumesny/master

v4.2.1