Conflicts:
plugins/ImageReader/ConfigUI.qml
plugins/PerObjectSettingsTool/PerObjectSettingsPanel.qml
plugins/PerObjectSettingsTool/SettingPickDialog.qml
resources/qml/Dialogs/DiscardOrKeepProfileChangesDialog.qml
resources/qml/Menus/ConfigurationMenu/CustomConfiguration.qml
resources/qml/Preferences/GeneralPage.qml
resources/qml/Preferences/Materials/MaterialsPage.qml
resources/qml/Preferences/Materials/MaterialsView.qml
resources/qml/Preferences/ProfilesPage.qml
These conflicts are all arising from headers/includes being updated at the same time, or from the two branches marking the other one's components as needing OldControls.
This introduced more OldControls markers which don't get marked as merge conflicts by Git. This happens when an element could just be left as the original name but from the new import (e.g. a Button stays a Button in Controls 2, but should be marked as from OldControls on the branch that doesn't update the Button).