Improve the structure of the welcome page slightly

I don't really like these pages in NeoChat much, there's only a few
buttons, and they really blend together. In an attempt to alleviate
this problem, I did the following:

* Added icons to the Login and Register actions, which does complement
the other buttons on this page.
* Removed the icons from the "Continue" and "Go back" buttons, which did
nothing but add confusing arrows.
* Moved the "Go back" button, fixed the capitalization and moved it to a
separate FormCard.
* Made it so the "Settings" button is only shown on the initial page, to
reduce the amount of UI clutter while logging in.

src/login/LoginRegister.qml

@@ -21,6 +21,7 @@ LoginStep {
 
     FormCard.FormButtonDelegate {
         id: loginButton
+        icon.name: "user-symbolic"
         text: i18nc("@action:button", "Login")
         onClicked: root.processed("Login")
     }
@@ -28,6 +29,7 @@ LoginStep {
     FormCard.FormDelegateSeparator {}
 
     FormCard.FormButtonDelegate {
+        icon.name: "network-server-symbolic"
         text: i18nc("@action:button", "Register")
         onClicked: root.processed("Homeserver")
     }

src/login/WelcomePage.qml

@@ -19,7 +19,7 @@ Kirigami.Page {
 
     property bool showExisting: false
     property bool _showExisting: showExisting && root.currentStepString === root.initialStep
-    property bool showSettings: true
+    property bool showSettings: _showExisting
     property alias currentStep: module.item
     property string currentStepString: initialStep
     property string initialStep: "LoginRegister"
@@ -245,6 +245,7 @@ Kirigami.Page {
                 }
 
                 FormCard.FormDelegateSeparator {
+                    above: null // Set this manually so KA doesn't decide to pick another unrelated delegate
                     below: continueButton
                     visible: (root.currentStep as LoginStep).nextAction
                 }
@@ -254,28 +255,31 @@ Kirigami.Page {
                     text: (root.currentStep as LoginStep).nextAction && (root.currentStep as LoginStep).nextAction.text ? (root.currentStep as LoginStep).nextAction.text : i18nc("@action:button", "Continue")
                     visible: (root.currentStep as LoginStep).nextAction
                     onClicked: (root.currentStep as LoginStep).nextAction.trigger()
-                    icon.name: "arrow-right-symbolic"
                     enabled: (root.currentStep as LoginStep).nextAction ? (root.currentStep as LoginStep).nextAction.enabled : false
                 }
-
-                FormCard.FormButtonDelegate {
-                    text: i18nc("@action:button", "Go back")
-                    visible: (root.currentStep as LoginStep).previousAction
-                    onClicked: (root.currentStep as LoginStep).previousAction.trigger()
-                    icon.name: "arrow-left-symbolic"
-                    enabled: (root.currentStep as LoginStep).previousAction ? (root.currentStep as LoginStep).previousAction.enabled : false
-                }
             }
 
             FormCard.FormCard {
                 Layout.topMargin: Kirigami.Units.largeSpacing * 2
                 maximumWidth: Kirigami.Units.gridUnit * 20
-                visible: root.showSettings
+                visible: root.showSettings || previousButtonDelegate.visible
+
                 FormCard.FormButtonDelegate {
                     text: i18nc("@action:button", "Settings")
                     icon.name: "settings-configure"
+                    visible: root.showSettings
                     onClicked: NeoChatSettingsView.open()
                 }
+
+                FormCard.FormButtonDelegate {
+                    id: previousButtonDelegate
+
+                    text: i18nc("@action:button", "Go Back")
+                    visible: (root.currentStep as LoginStep).previousAction
+                    onClicked: (root.currentStep as LoginStep).previousAction.trigger()
+                    enabled: (root.currentStep as LoginStep).previousAction ? (root.currentStep as LoginStep).previousAction.enabled : false
+                    trailingLogo.direction: Qt.LeftArrow
+                }
             }
         }
     }