filetree: prevent calling `stopWatching` method of `Finder` if it doesn't exist
filetree: prevent calling `stopWatching` method of `Finder` if it doesn't exist

jack89129/koding,rjeczalik/koding,gokmen/koding,drewsetski/koding,szkl/koding,andrewjcasal/koding,cihangir/koding,jack89129/koding,alex-ionochkin/koding,gokmen/koding,szkl/koding,usirin/koding,rjeczalik/koding,rjeczalik/koding,acbodine/koding,acbodine/koding,jack89129/koding,koding/koding,kwagdy/koding-1,usirin/koding,mertaytore/koding,sinan/koding,usirin/koding,koding/koding,rjeczalik/koding,kwagdy/koding-1,cihangir/koding,mertaytore/koding,mertaytore/koding,szkl/koding,drewsetski/koding,sinan/koding,koding/koding,gokmen/koding,andrewjcasal/koding,andrewjcasal/koding,gokmen/koding,mertaytore/koding,usirin/koding,sinan/koding,rjeczalik/koding,sinan/koding,alex-ionochkin/koding,drewsetski/koding,alex-ionochkin/koding,cihangir/koding,usirin/koding,andrewjcasal/koding,cihangir/koding,usirin/koding,mertaytore/koding,jack89129/koding,kwagdy/koding-1,szkl/koding,acbodine/koding,koding/koding,koding/koding,alex-ionochkin/koding,andrewjcasal/koding,jack89129/koding,koding/koding,gokmen/koding,cihangir/koding,alex-ionochkin/koding,rjeczalik/koding,jack89129/koding,acbodine/koding,cihangir/koding,alex-ionochkin/koding,jack89129/koding,sinan/koding,gokmen/koding,drewsetski/koding,szkl/koding,sinan/koding,cihangir/koding,drewsetski/koding,alex-ionochkin/koding,jack89129/koding,kwagdy/koding-1,koding/koding,gokmen/koding,andrewjcasal/koding,acbodine/koding,kwagdy/koding-1,usirin/koding,cihangir/koding,alex-ionochkin/koding,usirin/koding,kwagdy/koding-1,drewsetski/koding,acbodine/koding,acbodine/koding,mertaytore/koding,rjeczalik/koding,acbodine/koding,drewsetski/koding,szkl/koding,koding/koding,kwagdy/koding-1,kwagdy/koding-1,andrewjcasal/koding,sinan/koding,sinan/koding,szkl/koding,andrewjcasal/koding,mertaytore/koding,mertaytore/koding,szkl/koding,gokmen/koding,drewsetski/koding,rjeczalik/koding