LVM: add multi-selection pv-create menu item

removing the PV create dialog
add utility function for getting localized text with some placeholders
LVM: add multi-selection pv-remove menu item

removing the PV remove dialog
LVM: add multi-selection vg-create menu item
LVM: add multi-selection vg-remove menu item
LVM: add multi-selection lv-create menu item
LVM: add multi-selection lv-remove menu item
LVM: remove unused code
adjust tests for lvm multiselection