move menu widget into subpackage

menus.go

@@ -0,0 +1,38 @@
+package main
+
+import (
+	"github.com/bcicen/ctop/widgets"
+	ui "github.com/gizak/termui"
+)
+
+var helpDialog = []string{
+	"[h] - open this help dialog",
+	"[q] - exit ctop",
+}
+
+func HelpMenu(g *Grid) {
+	m := widgets.NewMenu(helpDialog)
+	m.TextFgColor = ui.ColorWhite
+	m.BorderLabel = "Help"
+	m.BorderFg = ui.ColorCyan
+	ui.Render(m)
+	ui.Handle("/sys/kbd/", func(ui.Event) {
+		ui.StopLoop()
+	})
+	ui.Loop()
+}
+
+func SortMenu(g *Grid) {
+	m := widgets.NewMenu(SortFields)
+	m.Selectable = true
+	m.TextFgColor = ui.ColorWhite
+	m.BorderLabel = "Sort Field"
+	m.BorderFg = ui.ColorCyan
+	ui.Render(m)
+	m.NavigationHandlers()
+	ui.Handle("/sys/kbd/<enter>", func(ui.Event) {
+		g.containerMap.config.sortField = m.Items[m.CursorPos]
+		ui.StopLoop()
+	})
+	ui.Loop()
+}