* feed settings: part of the grid, not needed
* progress queue: migrated to flex
* tab-bar-container: already fixed in scss
* zotero-lookup-multiline-progress: migrated to flex
* zotero-lookup-textbox: removed, does nothing
* #zotero-prefpane-advanced #data-dir-path: migrated to flex
* #zotero-prefpane-sync: migrated to flex on #storage-url, removed from #storage-password to fix layout
* .search-condition: migrated to flex
* updates.css: migrated to flex
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