Refactor batch installing files

Key issues fixed:
- Progress dialog showing up as white/hanging/getting stuck/unresponsive.

Key changes:
- Progress dialog now shows progress as a function of all files instead of per nca within a file.
- Overwrite existing files will overwrite all files in the selection.

src/yuzu/install_dialog.h

@@ -20,8 +20,9 @@ public:
     explicit InstallDialog(QWidget* parent, const QStringList& files);
     ~InstallDialog() override;
 
-    QStringList GetFilenames() const;
+    QStringList GetFiles() const;
     bool ShouldOverwriteFiles() const;
+    int GetMinimumWidth() const;
 
 private:
     QListWidget* file_list;
@@ -32,4 +33,4 @@ private:
     QLabel* description;
     QCheckBox* overwrite_files;
     QDialogButtonBox* buttons;
-};
+};