Fix "Item already exists outside of collection" error and UI weirdness dragging child items between items
Fix "Item already exists outside of collection" error and UI weirdness dragging child items between items

(Don't bother removing an existing row for the item when creating the new one, since the old one will be removed in the fullness of time.)


rmzelle/zotero,aurimasv/zotero,rmzelle/zotero,gracile-fr/zotero,retorquere/zotero,sendecomp/zotero,LinuxMercedes/zotero,LinuxMercedes/zotero,robamler/zotero,sendecomp/zotero,sendecomp/zotero,retorquere/zotero,adunning/zotero,robamler/zotero,hoehnp/zotero,egh/zotero,LinuxMercedes/zotero,gracile-fr/zotero,hoehnp/zotero,adunning/zotero,hoehnp/zotero,egh/zotero,rmzelle/zotero,gracile-fr/zotero,egh/zotero,fbennett/zotero,retorquere/zotero,robamler/zotero,adunning/zotero