showing topics on the cards list page
context-info: changed label: topics to ask => current topics
card back side: length in px instead of characters
added failing scenario: cards list page: show only cards of the current topics
implemented: show only cards of current topics
renamed menu point: list of all my cards => list of my cards
moved implemented scenario: see only cards of the current topics: new => card_list
added failing scenario: list all cards of the current user
correct scenario: list all cards of the current user
added failing step: I choose All My Cards
implemented: list all cards of the current user
correct link pathes
cards list page: spacing between menu and list
card-list-menu: use class menu
moved implemented scenario: list all cards of the current user: new => card_list
merged branch topics-on-cards-list
added failing scenario: see only cards of the current topics even if it's comma-separated without white space
added spec for CsvHelper
implemented: CsvHelper: ignore white-space at the beginning of an element
CsvHelper.get_trimmed_elements: handling nil and empty text