Remove string concatenation related to volume attachment

Translatable string "on" is a part of string concatenation
and it makes difficult to translate it properly.

Change-Id: Ib2bf65791899a3c69087749d3a5fcf5061568b5d
Closes-Bug: #1382874
Create buttons in network topology respect quotas

Network topology create (networks, routers, instances) buttons should respect
quotas and the buttons should show feedback if the quota is exceeded.

Change-Id: Ide0e461d598b0d623192a5b2455a0ad3340c5683
Closes-bug: 1367678
Merge "Remove string concatenation related to volume attachment"