Feature #6417 and #6478

I have started working on adding pg_dump options from PostgreSQL v11 to v15. I have redesigned the Backup dialog, previously it is having General, Data/Objects, and Options tab.

With the new design, we will have General, Data Options, Misc Options #1, Misc Options #2, and Objects tabs. Previously we have one switch control per row but I am proposing to have two switch controls per row and in the case of text control only one. In the Objects tab, we will be going to implement the tree-like structure to select the objects that need to be backup( #642).

Following are the changes that I am proposing: