v2.3.5 Patch #2

Primarily a regression fix for v2.3.5/v2.3.5patch1 which prevented ecommerce checkouts, there are some other fixes and tweaks

v235patch2 adds these features to v235patch1:

• adds new setting to bootstrap/bootstrap3 themes to limit menu item depth in navbars
• adds new setting to bootstrap3 theme to center main navbar (in addition to left & right alignment)
• adds new setting to bootstrap3 theme to allow for 'extra small' buttons ('small' size used in versions prior to v2.3.5)
• adds new bootstrap3 views for donations (uses columns instead of tables)

v235patch2 fixes these issues in v235patch1:
!!! Regression fix unable to checkout cart for most payment calculators since v2.3.5

• fixes version problem with patch 1 which held version as simply v2.3
• adjusts bootstrap3 'add item to cart' button styling
• removes some deprecated bootstrap/bootstrap3 swatches (theme styles)
• fixes some minor warnings when run under php v7

v235patch2 updates these 3rd party libraries in v235patch1:

• Adminer database manager to v4.2.3 for php v7 support
• elFinder file manager to latest code for security fixes, etc...