Feature: add clear logs functionality with Ctrl+L

Add keybinding to clear the logs view in the main panel.
When user presses Ctrl+L, the main panel's content will be cleared.

Fixes #403

pkg/gui/keybindings.go

@@ -461,6 +461,13 @@ func (gui *Gui) GetInitialKeybindings() []*Binding {
 			Modifier: gocui.ModNone,
 			Handler:  gui.scrollRightMain,
 		},
+		{
+			ViewName:    "main",
+			Key:         gocui.KeyCtrlL,
+			Modifier:    gocui.ModNone,
+			Handler:     wrappedHandler(gui.handleClearMain),
+			Description: gui.Tr.ClearMain,
+		},
 		{
 			ViewName: "filter",
 			Key:      gocui.KeyEnter,

pkg/gui/main_panel.go

@@ -98,6 +98,15 @@ func (gui *Gui) handleExitMain(g *gocui.Gui, v *gocui.View) error {
 	return gui.returnFocus()
 }
 
+func (gui *Gui) handleClearMain() error {
+	if gui.popupPanelFocused() {
+		return nil
+	}
+
+	gui.Views.Main.Clear()
+	return nil
+}
+
 func (gui *Gui) handleMainClick() error {
 	if gui.popupPanelFocused() {
 		return nil

pkg/i18n/english.go

@@ -39,6 +39,7 @@ type TranslationSet struct {
 	Confirm                     string
 	Return                      string
 	FocusMain                   string
+	ClearMain                   string
 	LcFilter                    string
 	StopContainer               string
 	RestartingStatus            string
@@ -166,6 +167,7 @@ func englishSet() TranslationSet {
 
 		Return:                      "return",
 		FocusMain:                   "focus main panel",
+		ClearMain:                   "clear logs",
 		LcFilter:                    "filter list",
 		Navigate:                    "navigate",
 		Execute:                     "execute",