selecting a sticker would sometimes add it to the wrong file

[linear[bot]]

GIT-456 selecting a sticker would sometimes add it to the wrong file

[luiisca]

sticker popover is a singleton, so it carries the data it was initially instantiated with on every call to open(), effectively making sticker popover point to the same file no matter which file it was opened for.

                            Popover.create({
                                id: STICKER_POPOVER_ID,
                                view: {
                                    Component: StickerPopoverComponent,
                                    props: {
                                        fileData
                                    }
                                },
                            }).open(this.refHtmlEl)