Issue 50926 - Remove dual spinner and other UI fixes
    
    Description:  Removed unnecessary spinner when loading the backup table.
                  Removed duplicate ID's from html
                  Revised Create Instance modal to be easier to read
                  Fixed typo in posix winsync fixup task help description
                  Removed unused CSS styles
                  Fixed plugin modal alignment issues
                  Fixed typo in Enable Replication modal
    
    relates: https://pagure.io/389-ds-base/issue/50926
    
    Reviewed by: spichugi(Thanks!)