puppeteer: Make fill_form function empty text fields before filling.
puppeteer: Make fill_form function empty text fields before filling.

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