Support text box editing via setting text attribute

[Ruzihm]

Adds the ability to set the text value of an input via winset.

Test Setup

1. Starting with TestGame, add the following verb to mob:

	verb/set_text()
		set name = "Set Text"
		winset(src,"outputwindow.input","text=asdf")

2. Compile and start server
3. Click "Set Text" verb in Verbs tab (test case 1)
4. Clear input box of any content, then type set-text in input box and press enter (test case 2)
5. Clear input box of any content, then type .winset "outputwindow.input.text="asdf"" in text box and press enter (test case 3)

Test Results

master OD:
The text box will be empty for all test cases

PR:
The text box will be set to asdf for all test cases

[wixoaGit]

Could you instead reset the text before running the command?

[Ruzihm]

Could you instead reset the text before running the command?

You know, I must have had a typo in an earlier test where I had something like:

.winset "outputwindow.input.text="" ? outputwindow.input.text="empty" : outputwindow.input.text="not empty""

because now when I try it in byond, it shows as empty. so yes that should work. 👍