addons: fsstorage: move initializer

cid #1170824
addons: handle unclosed addon tags

cid #1170827
cid #1170828
Qt: animators: missing initializers.

cid #1170830
addons: fsstorage: strip scheme from catalog path
addons: fsstorage: missing check for managed skins files
Qt: addons: clear spinner from view on empty list