v12.96 - Class Selection Dialogue (with drop-down boxes) (Patreon)

The last feature vote was pretty clear, most of you want to have an easier way for selecting classes.

Together with this come some bugfixes, improvements for importing, and better support for creating characters above level 20.

Changelog for MPMB's Character Record Sheet v12.96 (24 April 2017):
• NEW FEATURE: select the character’s class(es) with the help of a pop-up dialogue that has drop-down menus for classes and subclasses (not available in Adobe Acrobat XI or older);
• Fix for unrecognised classes not always being counted towards the total character level;
• Fix for number of attacks not always appearing on the Printer Friendly sheet (thanks Geo S. for reporting);
• Corrected the Psionic Talent Mind Slam’s damage to Force on the spell sheets (thanks Ricardo S. for reporting);
• Added Inertial Armour as an option for armour selection (as suggested by Ricardo S.);
• Updated the text of the pop-up menus for setting images to show the new feature of Adobe Acrobat Reader DC (update January 2017) to use any image file instead of only pdf files;
• Corrected the Fighter (Gunslinger) custom script to work with the new versions of the sheet, since v12.94 (thanks /u/Tamlane for reporting);
• Changed the import direct function to exclude new UA sources that aren’t available in the sheet importing from, instead of having these previously unknown sources added to the included list by default;
• Set the “Update Your Adobe Acrobat” warning to only appear the first three times the sheet is opened in a version of Adobe Acrobat that is older than DC;
• Made the level-dependent features of races/classes/feats/spells/etc. cap out at level 20, thus no longer throwing errors for characters over level 20 and classes with more than 20 levels in them; Note that class and racial features will not scale beyond level 20, because there are no official rules for that (as suggested by @LordvarekBeard).