Merge branch 'v7/dev' into v8/dev
# Conflicts: # src/Umbraco.Core/Services/NotificationService.cs # src/Umbraco.Web.UI.Client/src/less/tree.less # src/Umbraco.Web.UI.Client/src/views/common/overlays/mediaPicker/mediapicker.controller.js # src/Umbraco.Web/Properties/Settings.settings # src/Umbraco.Web/Properties/Settings1.Designer.cs
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