Improve UI flow for cloning new repos

[darcycox97]

Description

At the moment, the process of cloning a repository is quite confusing, with the two buttons "clone" and "save" not behaving as expected. For example, sometimes "save" opens up a file picker to choose location, and sometimes it just initiates a new clone.

I think it would make a lot of sense to have a single action button "clone", which clones the specified repository to the specified file location. This would remove any confusion around what each of the two separate buttons do, and prevent any premature cloning.

Also, a dedicated "browse" button to choose the save location would be a good addition.

If this is picked up, it could potentially interfere with some other cloning-related issues, such as #12 and #1, so people should be kept in the loop about this if they are simultaneously being worked on.

Acceptance Criteria

(these are suggestions and are somewhat subjective. Please comment if you think any of these are not useful, or have your own suggestions).

• Single button to perform cloning (i.e. cannot initiate clone from other buttons).
• Button for choosing location in file system to clone to.
• Text is shown in the file text box to show where the repo will be saved if we press clone. This should show a default location if no location selected, and should show the selected location otherwise.

[cyrus-raitava]

I approve of this, introducing this change would significantly increase user satisfaction, and usability of VisualGit.

[Ravid12]

I approve - well thought out designs for a usability fix. Great thinking, darcycox97

[lukethompsxn]

I agree, I found this very confusing at first. - Approved