UI polishing

Change-Id: I0218f1ee0915780470fa716f0f8fe990fcd3e839
Signed-off-by: Stephan <stegiemail-github@yahoo.de>
Fix getHumanReadableHoursFromDecimal for rounded value of 60 minutes

Change-Id: Ida4966c64b2bd0b3378d76e336aa06308bf3190b
Signed-off-by: Stephan <stegiemail-github@yahoo.de>
Working periods can be edited, saved and deleted

Change-Id: If9173a4cb0bb103703dc444ac323cf2a702acd65
Signed-off-by: Stephan <stegiemail-github@yahoo.de>