Fix position of zero-sized shape upon mousedown

[elbertronnie]

• Fixes the position of zero-sized shape upon mousedown before starting to draw the shape as specified in https://discord.com/channels/731730685944922173/881073965047636018/1111926515853164617.
• Fixes the indeterministic recenter by Ctrl+0 as specified in https://discord.com/channels/731730685944922173/881073965047636018/1178103299547877426.
• Fix typo in infinate