Improve text editing support in parameter inputs

[RamiAwar]

Parameter inputs don't allow for natural text editing, ex.

I think this is what #162 was trying to achieve.

Ctrl+Left or Cmd+Left to jump to start of line Ctrl+Backspace or Cmd+Backspace to clear all (useful when we have a default value we want to clear) ...

gocui seems to support defining a custom editor, we should add support for that. Some boilerplate code from komanda:

ui.Editor = gocui.EditorFunc(simpleEditor)
g.SetManagerFunc(ui.Layout)

func simpleEditor(v *gocui.View, key gocui.Key, ch rune, mod gocui.Modifier) {
    var tab = false
    var inHistroy = false

    switch {
    case key == gocui.KeyTab:
        tab = true
    case ch != 0 && mod == 0:
        v.EditWrite(ch)
    case key == gocui.KeySpace:
        v.EditWrite(' ')
    case key == gocui.KeyBackspace || key == gocui.KeyBackspace2:
        v.EditDelete(true)
    case key == gocui.KeyDelete:
        v.EditDelete(false)
    case key == gocui.KeyInsert:
        v.Overwrite = !v.Overwrite
    case key == gocui.KeyEnter:

        if line := v.ViewBuffer(); len(line) > 0 {
            GetLine(Server.Gui, v)
        } else {
            if c, err := Server.Gui.View(Server.CurrentChannel); err == nil {
                c.Autoscroll = true
            }
        }

        InputHistory.Current()

        // v.EditNewLine()
        // v.Rewind()

    // case key == gocui.MouseMiddle:
    // nextView(Server.Gui, v)
    // case key == gocui.MouseRight:

    case key == gocui.KeyArrowDown:
        inHistroy = true

        if line := InputHistory.Next(); len(line) > 0 {
            v.Clear()
            v.SetCursor(0, 0)
            v.SetOrigin(0, 0)

            fmt.Fprint(v, line)
            v.SetCursor(len(v.Buffer())-1, 0)
        }
    case key == gocui.KeyArrowUp:
        inHistroy = true

        if line := InputHistory.Prev(); len(line) > 0 {
            v.Clear()
            v.SetCursor(0, 0)
            v.SetOrigin(0, 0)

            fmt.Fprint(v, line)
            v.SetCursor(len(v.Buffer())-1, 0)
        }
    case key == gocui.KeyArrowLeft:
        v.MoveCursor(-1, 0, false)
    case key == gocui.KeyArrowRight:

        cx, _ := v.Cursor()
        line := v.ViewBuffer()

        // logger.Logger.Println(len(line), cx)
        // logger.Logger.Println(spew.Sdump(line))

        // if cx == 0 {
        // v.MoveCursor(-1, 0, false)
        if cx < len(line)-1 {
            v.MoveCursor(1, 0, false)
        }

    case key == gocui.KeyCtrlA:
        v.SetCursor(0, 0)
        v.SetOrigin(0, 0)
    case key == gocui.KeyCtrlK:
        v.Clear()
        v.SetCursor(0, 0)
        v.SetOrigin(0, 0)
    case key == gocui.KeyCtrlE:
        v.SetCursor(len(v.Buffer())-1, 0)
    case key == gocui.KeyCtrlLsqBracket:
        // logger.Logger.Println("word...")
    }

    if !inHistroy {
        // InputHistory.Current()
    }

    if !tab {
        // logger.Logger.Print("CALL\n")

        inCacheTab = false
        cacheTabSearch = ""
        cacheTabResults = []string{}
    }
}