feat: add selectedLineBgColor theme customization (#420)

docs/Config.md

@@ -24,6 +24,8 @@ gui:
       - bold
     inactiveBorderColor:
       - white
+    selectedLineBgColor:
+      - blue
     optionsTextColor:
       - blue
   returnImmediately: false

pkg/config/app_config.go

@@ -71,6 +71,7 @@ type UserConfig struct {
 type ThemeConfig struct {
 	ActiveBorderColor   []string `yaml:"activeBorderColor,omitempty"`
 	InactiveBorderColor []string `yaml:"inactiveBorderColor,omitempty"`
+	SelectedLineBgColor []string `yaml:"selectedLineBgColor,omitempty"`
 	OptionsTextColor    []string `yaml:"optionsTextColor,omitempty"`
 }
 
@@ -361,6 +362,7 @@ func GetDefaultConfig() UserConfig {
 			Theme: ThemeConfig{
 				ActiveBorderColor:   []string{"green", "bold"},
 				InactiveBorderColor: []string{"default"},
+				SelectedLineBgColor: []string{"blue"},
 				OptionsTextColor:    []string{"blue"},
 			},
 			ShowAllContainers:          false,

pkg/gui/views.go

@@ -101,7 +101,7 @@ func (gui *Gui) createAllViews() error {
 		(*mapping.viewPtr).FgColor = gocui.ColorDefault
 	}
 
-	selectedLineBgColor := gocui.ColorBlue
+        selectedLineBgColor := GetGocuiStyle(gui.Config.UserConfig.Gui.Theme.SelectedLineBgColor)
 
 	gui.Views.Main.Wrap = gui.Config.UserConfig.Gui.WrapMainPanel
 	// when you run a docker container with the -it flags (interactive mode) it adds carriage returns for some reason. This is not docker's fault, it's an os-level default.