Add download button to more pages + UI fixes

Signed-off-by: timoreo <contact@timoreo.fr>

launcher/ui/pages/instance/InstanceSettingsPage.cpp

@@ -49,6 +49,7 @@
 #include "JavaCommon.h"
 #include "Application.h"
 
+#include "JavaDownloader.h"
 #include "java/JavaInstallList.h"
 #include "java/JavaUtils.h"
 #include "FileSystem.h"
@@ -374,6 +375,11 @@ void InstanceSettingsPage::loadSettings()
     ui->serverJoinAddress->setText(m_settings->get("JoinServerOnLaunchAddress").toString());
 }
 
+void InstanceSettingsPage::on_javaDownloadBtn_clicked()
+{
+    JavaDownloader::showPrompts(this);
+}
+
 void InstanceSettingsPage::on_javaDetectBtn_clicked()
 {
     if (JavaUtils::getJavaCheckPath().isEmpty()) {