Update undo redo sort tests

[kkangs0226]

Please ignore the DG it got added wrongly. I'm working on DG on another branch

[codecov-io]

Codecov Report

Merging #267 (de63d20) into fix-coding-standards (deddc30) will increase coverage by 0.24%.
The diff coverage is 78.00%.

@@                    Coverage Diff                     @@
##             fix-coding-standards     #267      +/-   ##
==========================================================
+ Coverage                   76.31%   76.56%   +0.24%     
  Complexity                   1119     1119              
==========================================================
  Files                         147      147              
  Lines                        3319     3320       +1     
  Branches                      354      352       -2     
==========================================================
+ Hits                         2533     2542       +9     
+ Misses                        671      665       -6     
+ Partials                      115      113       -2     

Impacted Files	Coverage Δ	Complexity Δ
src/main/java/seedu/momentum/MainApp.java	0.00% <ø> (ø)	0.00 <0.00> (ø)
...eedu/momentum/commons/core/StatisticTimeframe.java	97.14% <ø> (ø)	10.00 <0.00> (ø)
...rc/main/java/seedu/momentum/model/ProjectBook.java	84.00% <ø> (ø)	21.00 <0.00> (ø)
src/main/java/seedu/momentum/model/UserPrefs.java	98.27% <ø> (ø)	22.00 <0.00> (ø)
...ava/seedu/momentum/model/VersionedProjectBook.java	89.13% <ø> (ø)	28.00 <0.00> (ø)
...ava/seedu/momentum/storage/JsonAdaptedProject.java	96.61% <ø> (ø)	3.00 <0.00> (ø)
...n/java/seedu/momentum/storage/JsonAdaptedTask.java	94.87% <ø> (ø)	3.00 <0.00> (ø)
src/main/java/seedu/momentum/ui/BottomBar.java	0.00% <ø> (ø)	0.00 <0.00> (ø)
src/main/java/seedu/momentum/ui/MainWindow.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
src/main/java/seedu/momentum/ui/PieChartCard.java	0.00% <ø> (ø)	0.00 <0.00> (ø)
... and 26 more

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