Fix bug in details command

[yongxiangng]

Code snippet causing the bug. command result is needed to know if the ui should show persons as details or not. however, when the result is received, the model is updated already (model updates during execution) and setting show details does not update the personlistpanel component, so we have to explicitly tell it to refresh

            CommandResult commandResult = logic.execute(commandText);
            logger.info("Result: " + commandResult.getFeedbackToUser());
            resultDisplay.setFeedbackToUser(commandResult.getFeedbackToUser());

            if (commandResult.isShowHelp()) {
                handleHelp();
            }

            if (commandResult.isExit()) {
                handleExit();
            }

            personListPanel.setShowDetails(commandResult.isShowDetails());

The cause of the bug was due to personListPanel not refreshing. Note that calling personListView.refresh(); is not sufficient to refresh the entire component. setting items and cell factory does a "refresh".

This closes #47 .

[codecov-commenter]

Codecov Report

Merging #48 (efff960) into master (4015615) will decrease coverage by 0.27%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master      #48      +/-   ##
============================================
- Coverage     70.65%   70.38%   -0.28%     
  Complexity      417      417              
============================================
  Files            75       75              
  Lines          1295     1300       +5     
  Branches        132      132              
============================================
  Hits            915      915              
- Misses          345      350       +5     
  Partials         35       35              

Impacted Files	Coverage Δ
...rc/main/java/seedu/address/ui/PersonListPanel.java	0.00% <0.00%> (ø)

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