settings_orgs: Add hover like effects on focus for save-discard buttons.
settings_orgs: Add hover like effects on focus for save-discard buttons.

This uses the same effect as hovering over the button when they are
focused using keyboard shortcuts such as Tab or Alt + Tab.

eeshangarg/zulip,andersk/zulip,hackerkid/zulip,andersk/zulip,punchagan/zulip,punchagan/zulip,andersk/zulip,rht/zulip,kou/zulip,rht/zulip,hackerkid/zulip,eeshangarg/zulip,eeshangarg/zulip,hackerkid/zulip,eeshangarg/zulip,kou/zulip,rht/zulip,andersk/zulip,eeshangarg/zulip,kou/zulip,zulip/zulip,hackerkid/zulip,eeshangarg/zulip,andersk/zulip,rht/zulip,zulip/zulip,rht/zulip,andersk/zulip,punchagan/zulip,punchagan/zulip,zulip/zulip,rht/zulip,hackerkid/zulip,andersk/zulip,zulip/zulip,hackerkid/zulip,kou/zulip,kou/zulip,punchagan/zulip,zulip/zulip,rht/zulip,kou/zulip,punchagan/zulip,hackerkid/zulip,punchagan/zulip,kou/zulip,zulip/zulip,eeshangarg/zulip,zulip/zulip