[Client][Servers] Add a skeleton of server edit dialog.

It's based on HatoholUserEditDialog.
And I named it "HatoholServerEditDialog".
Because it will provide to change server infomation in the future.
[Client][HatoholServerEditDialog] Fix mistake.
[Client][HatoholServerEditDialog] Start a new line.
[Client][Servers] Add button for adding a server.
[Client][HatoholServerEditDialog] Fix a wrong function name.

fixupAndButtonState ->
fixupAddButtonState
      ^
[Client][HatoholServerEditDialog] Set default value.
[Client][HatoholServerEditDialog] Fix typo.
[Client][HatoholServerEditDialog] Fix my mistake.
[Client][HatoholServerEditDialog] Add new funtion:
getFlagsFromServerType()
[Client][HatoholServerDialog] Use argument.
[Client][HatoholServerDialog][Servers] Use two-character space instead of tab.
[Client][HatoholServerEditDialog] Use defined value.
[Client][HatoholServerEditDialog] Disable DBName text box when server
type is zabbix.
[Client][HatoholServerEditDialog] Change function name.

postAddAction ->
postAddServer
[Client][HatoholServerEditDialog] Fix validate parameter.
[Client][HatoholServerEditDialog] Fix call function.

I forgot to fix this.
[Client][Servers] Add skeleton of server delete button.
[Client][HatoholServerEditDialog] Fix wrong id.
[Client][Servers] Fix table header.
[Client][Servers] Disable delete server button when check boxes aren't
checked.