UI: Dropdown doesn't list all the entries

##### ISSUE TYPE
* Enhancement Request

##### COMPONENT NAME

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UI
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##### CLOUDSTACK VERSION

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All versions which have the new UI
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##### CONFIGURATION

N/A

##### OS / ENVIRONMENT

N/A

##### SUMMARY

The dropdown in the UI fetches all domains at once with the default page size. If the actual count of resources is higher, the keyword search doesn't work and the domains after the default page size can't be selected in the UI.

##### STEPS TO REPRODUCE

1. Create 10 domains with different names.
2. Set the default page size to 5.
3. The domain list while launching or importing a VM, doesn't show all the records.

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##### EXPECTED RESULTS

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I should be able to see all records or search by keyword and select. Or allow entering a UUID manually.
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##### ACTUAL RESULTS

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All entries in the drop down are not listed.
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