Rephrasing confusing messages (#6876)

Author: alexandremattioli

ui/public/locales/en.json

@@ -2723,22 +2723,22 @@
 "message.volume.state.attaching": "The volume is attaching to a volume from Ready state.",
 "message.volume.state.copying": "Volume is copying from image store to primary, in case it's an uploaded volume.",
 "message.volume.state.creating": "The volume is being created.",
-"message.volume.state.destroy": "The volume was destroyed, and cannot be recovered.",
+"message.volume.state.destroy": "The volume has been destroyed.",
 "message.volume.state.destroying": "The volume is being destroyed, and cannot be recovered.",
 "message.volume.state.expunged": "The volume has been expunged.",
 "message.volume.state.expunging": "The volume is being expunged",
-"message.volume.state.migrating": "The volume is migrating to other storage pool.",
+"message.volume.state.migrating": "The volume is being migrated to another storage pool.",
 "message.volume.state.notuploaded": "The volume entry is just created in DB, not yet uploaded.",
 "message.volume.state.ready": "The volume is ready to be used.",
 "message.volume.state.resizing": "The volume is being resized.",
-"message.volume.state.revertsnapshotting": "There is a snapshot created on this volume, the volume is being reverting from snapshot.",
-"message.volume.state.snapshotting": "There is a snapshot created on this volume, not backed up to secondary storage yet.",
-"message.volume.state.uploadabandoned": "Volume upload is abandoned since the upload was never initiated within a specified time.",
+"message.volume.state.revertsnapshotting": "There is a snapshot of this volume, the volume is being reverted from a snapshot.",
+"message.volume.state.snapshotting": "There is a snapshot being created of this volume but not copied to secondary storage yet.",
+"message.volume.state.uploadabandoned": "Volume upload has been abandoned as the upload wasn't initiated within the specified time.",
 "message.volume.state.uploaded": "Volume is uploaded.",
 "message.volume.state.uploaderror": "Volume upload encountered some error.",
 "message.volume.state.uploadinprogress": "Volume upload is in progress.",
-"message.volume.state.uploadop": "The volume upload operation is in progress or in short the volume is on secondary storage.",
-"message.volume.state.primary.storage.suitability": "The suitability of a primary storage for a volume depends on the disk offering of the volume and on the virtual machine allocations if the volume is attached to a virtual machine.",
+"message.volume.state.uploadop": "The volume upload operation is in progress and will be on secondary storage shortly.",
+"message.volume.state.primary.storage.suitability": "The suitability of a primary storage for a volume depends on the disk offering of the volume and on the virtual machine allocation (if the volume is attached to a virtual machine).",
 "message.vr.alert.upon.network.offering.creation.l2": "As virtual routers are not created for L2 networks, the compute offering will not be used.",
 "message.vr.alert.upon.network.offering.creation.others": "As none of the obligatory services for creating a virtual router (VPN, DHCP, DNS, Firewall, LB, UserData, SourceNat, StaticNat, PortForwarding) are enabled, the virtual router will not be created and the compute offering will not be used.",
 "message.warn.filetype": "jpg, jpeg, png, bmp and svg are the only supported image formats.",