remove proposal_name that require proposer to fill in as PK

[libhasheos]

Currently there are two parameters in propose page:
proposal name and title which is confusing for developers.

Basically proposal_name is the PK for proposal_row table

referendum/contracts/eosio.forum/include/forum.hpp

Lines 87 to 100 in 84e28b1

	struct [[eosio::table]] proposal_row {
	name proposal_name;
	name proposer;
	string title;
	string proposal_json;
	time_point_sec created_at;
	time_point_sec expires_at;
	auto primary_key()const { return proposal_name.value; }
	uint64_t by_proposer() const { return proposer.value; }
	bool is_expired() const { return current_time_point_sec() >= expires_at; }
	bool can_be_cleaned_up() const { return current_time_point_sec() > (expires_at + FREEZE_PERIOD_IN_SECONDS); }
	};

It's necessary to remove the burden for develop to key in this 12 character primary key and allow either auto-incremental PK or random identifier to be generated to identify a particular proposal.

https://boswps.io

[DenisCarriere]

Using auto increment makes it very challenging for others to find/approve a particular escrow.

This is the same as submitting an MSIG proposal, adding a 12 character unique ID is very easy for devs/propopers