Added triangle, quad and condline to the add object dialog

Begin work on dialogs for adding objects. Comments functional!

Implemented insertion of triangles, quads, condlines and comments

er, I said don't limit the amount of decimals

ftoa: don't limit the amount of decimals

Temporarily set the locale to C when using ftoa, or the resulting string is subject to the locale and gets unexpected symbols (e.g. commas for the decimal dots while the function expects periods)

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mercurial