[Simulator] Minor UI changes fixing the IOT-1087.

[Simulator] Minor UI changes fixing the IOT-1087.

1. Added UI support to allow the resource type property to be editable
during resource creation from RAML.
2. Added a new dialog to edit the resource name and resource type during
the creation of multiple resource instances from RAML.
3. Removed the native code which forms rt when it is not specified
in RAML. For this case, plugin will pop-up the above mentioned dialog to
get the resource type from user.

Change-Id: I9a7c927fc63e3ff22db62ae07ce23e63ec8e05d8
Signed-off-by: G S Senthil Kumar <senthil.gs@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/8115
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Harish Marappa <h.marappa@samsung.com>
Reviewed-by: Madan Lanka <lanka.madan@samsung.com>