Seznam autobusů and vagonWEB formations for transit maps

Adds links to Seznam-autobusů.cz and vagonWEB and downloads ČD train formations to traffic maps of Czech transit companies.

Specific support: PMDP – Seznam autobusů (Bus List) link and location button SŽ – button for vagonWEB and a link to ČD train details PID – button for vagonWEB, ČD train formations and link to ČD train details Jikord – button for DPČB Bus List, button for vagonWEB, ČD train formation and link to ČD train details JMK – button for vagonWEB, replacement of ŽelPage button DÚK – link to vagonWEB DPMD – link to Bus List ŽSR – link to vagonWEB Parts of the code are inspired by the extension Řazení ČD pro Interaktivní mapu a GRAPP by Kateřina Miháliková (https://chromewebstore.google.com/detail/bjomckdmonhmampoglcppieincjighce).