allow configuring side panel width

docs/Config.md

@@ -12,6 +12,7 @@ Default path for the config file:
     # stuff relating to the UI
     scrollHeight: 2 # how many lines you scroll by
     scrollPastBottom: true # enable scrolling past the bottom
+    sidePanelWidth: 0.3333 # number from 0 to 1
     theme:
       lightTheme: false # For terminals with a light background
       activeBorderColor:

pkg/config/app_config.go

@@ -244,6 +244,7 @@ func GetDefaultConfig() []byte {
   scrollPastBottom: true
   mouseEvents: true
   skipUnstageLineWarning: false
+  sidePanelWidth: 0.3333
   theme:
     lightTheme: false
     activeBorderColor:

pkg/gui/gui.go

@@ -520,11 +520,13 @@ func (gui *Gui) layout(g *gocui.Gui) error {
 	_, _ = g.SetViewOnBottom("limit")
 	g.DeleteView("limit")
 
+	sidePanelWidthRatio := gui.Config.GetUserConfig().GetFloat64("gui.sidePanelWidth")
+
 	textColor := theme.GocuiDefaultTextColor
 	var leftSideWidth int
 	switch gui.State.ScreenMode {
 	case SCREEN_NORMAL:
-		leftSideWidth = width / 3
+		leftSideWidth = int(float64(width) * sidePanelWidthRatio)
 	case SCREEN_HALF:
 		leftSideWidth = width / 2
 	case SCREEN_FULL: