terminal: handle `drop` event of outputbox
terminal: handle `drop` event of outputbox

Send plain text version of drop event data content to server.

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