i18n: Translate Edit/View Source button's hmtl tooltip text.
i18n: Translate Edit/View Source button's hmtl tooltip text.

This commit tags the html tooltip text for internationalization.

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