[Enhancement] Usability improvements

[vladimirpetrov]

Describe the bug
Here I'll compile all the usability / user experience improvement ideas, separated by sections.

Common

• When you click on a main section, it would be better to open the first (default) or the last used view - now we need additional click.
• There are labels that look clickable (they are even animated when clicked) but are not. For example in instance view, below the instance name.
• When opening a dialog, the first element should be active (with the cursor ready for typing). This avoids extra clicks.
• 'Clear search filter' button - now the way to clear it is to delete the text and click on the search icon.
• Pagination - it's good to have buttons for the first and last pages, not only previous/next.
• Pagination - text 'showing 11-21 items'.
• Proper human readable volume/disk spaces - for example Physical Size 0.0002 GB is not the best, it could be 0.2 MB or even 200 kb. Another example - 0.3007 GB.
• Some dialogs do not have 'Cancel' buttons - for example 'Assign Instance to Another Account'. The 'x' icon on the top right corner is always an option but I think we should be consistent here.
• Probably a button 'expand/collapse all' in the grids might be helpful.
• Created time should be in more human-readable format, not 2020-02-04T09:20:29+0000

Compute > Instances

• It's better to have 'Take VM volume snapshot' and 'View host' icons even when the VM is not running - just make them grayed-out and non-clickable.
• When clicking on an instance, in the breadcrumb you can see the instance ID, instead of its name.

Compute > Instances > Deployment wizard

• No default selection is made/offered for "compute offering".
• No default selection is made/offered for "network".

Compute > Instances > selected instance

• CPU/Memory usage indicators are static, refreshed only on demand.
• Settings - it would be nice to have syntax completion when adding new settings.

Compute > Instances > selected instance > network adapters

• Missing tooltips for network adapters icons - make default NIC and delete NIC.
• No way to distinguish Broadcast URI and Isolation URI in the new UI.