webadmin: Fix new/edit pool dialogs for ja locale

webadmin: Fix new/edit pool dialogs for ja locale

- Change the layout of some components in the new & edit pool
  dialogs to use relative values for their locations instead of
  absolute values
  that way, the dialog's layout supports long japanese terms
- Rename newPoolPrestartedVmsIcon style to prestartedVmsIcon
  as this style is used for edit dialog also
- Fix some typos (incrase -> increase)

Change-Id: I5b9ead456e355f66eb4d8363fe0706ee4552c9fb
Bug-Url: https://bugzilla.redhat.com/870251
Signed-off-by: Arik Hadas <ahadas@redhat.com>