[FEATURE] Fixes #205. Added Host management feature.

[anvithks]

Added the host management feature.
User can perform the following:

• Add an existing Agentless host
• View the list of hosts available.
• View the details of a single host
• Expand the details in the host list.
• Delete a single host.
• Batch delete multiple hosts.
• List Attached volumes and Initiators
• Modify host (To be fixed in Modify Host added by the user #213 )

Screenshots:
List Hosts

Add Host

Add Host Basic Validations

Expand Host Details

Host Details

[anvithks]

@wisererik and @kumarashit Please review the PR.
Modify host feature will be added in #213

[anvithks]

In list host page the overflowing availability zones issue seen in the screenshots above is fixed.

[kumarashit]

One generic comment for the UI, we are using 'Please' word everywhere like "Please select host" "Please choose a protocol"..IMO, we should avoid using 'please' word unless we are asking some inconvenient input from user.
Just a thought

[anvithks]

One generic comment for the UI, we are using 'Please' word everywhere like "Please select host" "Please choose a protocol"..IMO, we should avoid using 'please' word unless we are asking some inconvenient input from user.
Just a thought

Generally it is to keep the tone polite. It is again a perception thing whether we consider saying please only for an inconvenience. We can review the overall messages and tone when we start the rewrite of the dashboard. I will add this is a ToDo for the design phase.

[skdwriting]

@anvithks how did we test these dashboard changes? Can we keep a clear test information on this?

[skdwriting]

@anvithks how did we test these dashboard changes? Can we keep a clear test information on this?

We do not have the backend ready yet right?

[anvithks]

@anvithks how did we test these dashboard changes? Can we keep a clear test information on this?

@skdwriting These are tested with @wisererik s local dev environment. They have not been tested with a backend created from development branch yet.

[anvithks]

@kumarashit @skdwriting Please review and merge

[kumarashit]

LGTM