navigate to first line key

Former-commit-id: 8e07c53091aaedc14c5b182c2cacd71c276e5dc1 [formerly 8e07c53091aaedc14c5b182c2cacd71c276e5dc1 [formerly 29d16c7850911eeb7b6176549ce360cbe8d6d4e5 [formerly 4f0eb30606]]]
Former-commit-id: 64a7e2711686acb92c839a3686e660b7da1f1868
Former-commit-id: 552c724fd03747b28061e4fbadc94fb4c364da56 [formerly 496eb3582bf878a4358328afe3d443d56b1a3136]
Former-commit-id: 3f9df39ce0e2afacc76e2c03ad33ec5102f3a2c9

README.md

@@ -69,6 +69,7 @@ Key|Action
 <kbd>2</kbd>|sort by *[2]4 hour change*
 <kbd>7</kbd>|sort by *[7] day change*
 <kbd>a</kbd>|sort by *[a]vailable supply*
+<kbd>g</kbd>|navigate to first line
 <kbd>G</kbd>|navigate to last line
 <kbd>h</kbd>|alias to previous page
 <kbd>j</kbd>|alias to navigate down

cointop/keybindings.go

@@ -38,6 +38,7 @@ func (ct *Cointop) keybindings(g *gocui.Gui) error {
 	ct.setKeybinding('2', ct.sortfn("24hchange", true))
 	ct.setKeybinding('7', ct.sortfn("7dchange", true))
 	ct.setKeybinding('a', ct.sortfn("availablesupply", true))
+	ct.setKeybinding('g', ct.navigateFirstLine)
 	ct.setKeybinding('G', ct.navigateLastLine)
 	ct.setKeybinding('h', ct.prevPage)
 	ct.setKeybinding('j', ct.cursorDown)

cointop/navigation.go

@@ -91,6 +91,22 @@ func (ct *Cointop) pageUp(g *gocui.Gui, v *gocui.View) error {
 	return nil
 }
 
+func (ct *Cointop) navigateFirstLine(g *gocui.Gui, v *gocui.View) error {
+	if ct.tableview == nil {
+		return nil
+	}
+	ox, _ := ct.tableview.Origin()
+	cx, _ := ct.tableview.Cursor()
+	if err := ct.tableview.SetOrigin(ox, 0); err != nil {
+		return err
+	}
+	if err := ct.tableview.SetCursor(cx, 0); err != nil {
+		return err
+	}
+	ct.rowChanged()
+	return nil
+}
+
 func (ct *Cointop) navigateLastLine(g *gocui.Gui, v *gocui.View) error {
 	if ct.tableview == nil {
 		return nil