[ticket/251] Replace colons in HTML files with L_COLON

B3P-251
Merge pull request #253 from marc1706/ticket/251

[ticket/251] Replace colons in HTML files with L_COLON
[ticket/251] Fix display of date of users upcoming birthdays

B3P-251
Merge pull request #254 from marc1706/ticket/251

[ticket/251] Fix display of date of users upcoming birthdays