padding-left added for nested ul in layertree.less for class .treenode
padding-left added for nested ul in layertree.less for class .treenode

closes #845

adube/ngeo,pgiraud/ngeo,camptocamp/ngeo,kalbermattenm/ngeo,Jenselme/ngeo,camptocamp/ngeo,camptocamp/ngeo,Jenselme/ngeo,Jenselme/ngeo,pgiraud/ngeo,adube/ngeo,adube/ngeo,camptocamp/ngeo,Jenselme/ngeo,kalbermattenm/ngeo,ger-benjamin/ngeo,adube/ngeo,camptocamp/ngeo,pgiraud/ngeo,kalbermattenm/ngeo,ger-benjamin/ngeo,ger-benjamin/ngeo