Add Directory in pgAdmin4 Object Explorer.

[RohitBhati8269]

Detail Info:- #8034

[akshay-joshi]

1. Create Script throwing a syntax error, select any existing directory, right-click, and click 'Create Script'. Run the script. Check the SQL panel also after the fix.
2. The "-- Drop Directory "  comment is missing in the SQL tab and Create Script.
3. The Security Tab is visible from EPAS 17 then for lesser versions it should not be visible in the Properties Panel (near Dashboards).
4. EPAS 17- Grant Read and Write Privileges to 2 different users respectively. Select that directory and check the Properties panel, Privileges are showing empty.
5. Take all the screenshots again as all the borders should be visible.
6. Why there are two files "alter.sql" and "update.sql"? Some SQL's are identical there, please merge the logic into one if possible.
7. Replace PPAS with EPAS in the string "are not supported by PPAS" in all the files of the entire project.