Issue title: No response frome button view reminders
 Issue body: I install v0.2.5 in MM v5.10, when I add a remind, the view reminders button in post message has no response. The issue is similar with #93 
 Comments: 
 Comment 0: Confirmed, thank you @tgly307 !  I will get to this asap.  :)
 Comment 1: @tgly307 the problem should be fixed in 0.2.6
https://github.com/scottleedavis/mattermost-plugin-remind/releases/tag/v0.2.6
 Comment 2: @scottleedavis thanks a lot!
I have test v0.2.6 on MM 5.11, it works fine.
I will close this issue.
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