Move storage upload configuration to separate tab, later it can be uses for a plugin manager

src/config/uploadstorageconfig.cpp

@@ -0,0 +1,64 @@
+// Copyright(c) 2020 Yurii Puchkov at Namecheap & Contributors
+//
+// This file is part of Flameshot.
+//
+//     Flameshot is free software: you can redistribute it and/or modify
+//     it under the terms of the GNU General Public License as published by
+//     the Free Software Foundation, either version 3 of the License, or
+//     (at your option) any later version.
+//
+//     Flameshot is distributed in the hope that it will be useful,
+//     but WITHOUT ANY WARRANTY; without even the implied warranty of
+//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//     GNU General Public License for more details.
+//
+//     You should have received a copy of the GNU General Public License
+//     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
+
+#include "uploadstorageconfig.h"
+#include "src/tools/storage/imgstorages.h"
+#include "src/utils/confighandler.h"
+
+#include <QCheckBox>
+#include <QGroupBox>
+#include <QRadioButton>
+#include <QVBoxLayout>
+
+UploadStorageConfig::UploadStorageConfig(QWidget* parent)
+  : QWidget(parent)
+{
+    m_layout = new QVBoxLayout(this);
+    m_layout->setAlignment(Qt::AlignTop);
+
+    QGroupBox* groupBox = new QGroupBox(tr("Upload storage"));
+
+    // TODO - remove dependency injection (s3 & imgur)
+    // imgur
+    QRadioButton* storageImgUr = new QRadioButton(tr("Imgur storage"));
+    connect(storageImgUr, &QCheckBox::clicked, [](bool checked) {
+        ConfigHandler().setUploadStorage(SCREENSHOT_STORAGE_TYPE_IMGUR);
+    });
+
+    // s3
+    QRadioButton* storageImgS3 = new QRadioButton(
+      tr("S3 storage (require config.ini file with s3 credentials)"));
+    connect(storageImgS3, &QCheckBox::clicked, [](bool checked) {
+        ConfigHandler().setUploadStorage(SCREENSHOT_STORAGE_TYPE_S3);
+    });
+
+    // set current storage radiobutton active
+    if (ConfigHandler().uploadStorage() == SCREENSHOT_STORAGE_TYPE_IMGUR) {
+        storageImgUr->setChecked(true);
+
+    } else {
+        storageImgS3->setChecked(true);
+    }
+
+    // draw configuration options for uploadStorage
+    QVBoxLayout* vbox = new QVBoxLayout;
+    vbox->addWidget(storageImgUr);
+    vbox->addWidget(storageImgS3);
+    vbox->addStretch(1);
+    groupBox->setLayout(vbox);
+    m_layout->addWidget(groupBox);
+}