Don't add a suprious history item when loading conversations
Don't add a suprious history item when loading conversations

Fixes CNVS-21058

Test plan:
 - Visit a page other than Conversations
 - Click on the Inbox link to go to Conversations
 - Press your browser's back button once
 - Ensure that you were taken back to the previous page

Change-Id: I5a9ccb4e8fcf6f1205c496d2ad0e9385f1122153
Reviewed-on: https://gerrit.instructure.com/56067
Tested-by: Jenkins
Reviewed-by: Mark Severson <cdf1f90aee9d0d073a2a24141ebc71887f3ba533@instructure.com>
QA-Review: Steven Shepherd <e794458448443812fb2685675aab3bbd1a3891bc@instructure.com>
Product-Review: Alex Boyd <6bb5a335b0b6c251e818c0de653d342158f949f9@instructure.com>

leftplusrightllc/canvas-lms,HotChalk/canvas-lms,dgynn/canvas-lms,skmezanul/canvas-lms,roxolan/canvas-lms,shidao-fm/canvas-lms,whalejasmine/canvas-lms,tgroshon/canvas-lms,kyroskoh/canvas-lms,sfu/canvas-lms,grahamb/canvas-lms,snehakachroo1/LSI_replica,wrdsb/canvas-lms,grahamb/canvas-lms,grahamb/canvas-lms,SwinburneOnline/canvas-lms,shidao-fm/canvas-lms,fronteerio/canvas-lms,utkarshx/canvas-lms,sdeleon28/canvas-lms,skmezanul/canvas-lms,grahamb/canvas-lms,shidao-fm/canvas-lms,tgroshon/canvas-lms,matematikk-mooc/canvas-lms,wrdsb/canvas-lms,Jyaasa/canvas-lms,snehakachroo1/LSI_replica,SwinburneOnline/canvas-lms,HotChalk/canvas-lms,wrdsb/canvas-lms,Jyaasa/canvas-lms,roxolan/canvas-lms,sfu/canvas-lms,dgynn/canvas-lms,leftplusrightllc/canvas-lms,redconfetti/canvas-lms,instructure/canvas-lms,sdeleon28/canvas-lms,djbender/canvas-lms,matematikk-mooc/canvas-lms,djbender/canvas-lms,fronteerio/canvas-lms,AndranikMarkosyan/lms,jay3126/canvas-lms,eCNAP/CANVAS,eCNAP/CANVAS,efrj/canvas-lms,instructure/canvas-lms,utkarshx/canvas-lms,kyroskoh/canvas-lms,wrdsb/canvas-lms,redconfetti/canvas-lms,sfu/canvas-lms,utkarshx/canvas-lms,shidao-fm/canvas-lms,jay3126/canvas-lms,ShreniiNepal/shrenii_lmp,SwinburneOnline/canvas-lms,HotChalk/canvas-lms,dgynn/canvas-lms,AndranikMarkosyan/lms,juoni/canvas-lms,roxolan/canvas-lms,instructure/canvas-lms,greyhwndz/canvas-lms,tgroshon/canvas-lms,juoni/canvas-lms,whalejasmine/canvas-lms,utkarshx/canvas-lms,HotChalk/canvas-lms,grahamb/canvas-lms,sfu/canvas-lms,eCNAP/CANVAS,matematikk-mooc/canvas-lms,AndranikMarkosyan/lms,eCNAP/CANVAS,Rvor/canvas-lms,efrj/canvas-lms,greyhwndz/canvas-lms,skmezanul/canvas-lms,sfu/canvas-lms,matematikk-mooc/canvas-lms,efrj/canvas-lms,Rvor/canvas-lms,skmezanul/canvas-lms,instructure/canvas-lms,redconfetti/canvas-lms,narigone/canvas,fronteerio/canvas-lms,venturehive/canvas-lms,instructure/canvas-lms,Rvor/canvas-lms,leftplusrightllc/canvas-lms,dgynn/canvas-lms,juoni/canvas-lms,kyroskoh/canvas-lms,efrj/canvas-lms,kyroskoh/canvas-lms,antoniuslin/canvas-lms,antoniuslin/canvas-lms,redconfetti/canvas-lms,juoni/canvas-lms,antoniuslin/canvas-lms,AndranikMarkosyan/lms,Jyaasa/canvas-lms,whalejasmine/canvas-lms,venturehive/canvas-lms,greyhwndz/canvas-lms,jay3126/canvas-lms,venturehive/canvas-lms,sdeleon28/canvas-lms,narigone/canvas,greyhwndz/canvas-lms,instructure/canvas-lms,djbender/canvas-lms,whalejasmine/canvas-lms,ShreniiNepal/shrenii_lmp,sfu/canvas-lms,narigone/canvas,narigone/canvas,antoniuslin/canvas-lms,instructure/canvas-lms,sdeleon28/canvas-lms,snehakachroo1/LSI_replica,ShreniiNepal/shrenii_lmp,Jyaasa/canvas-lms,leftplusrightllc/canvas-lms,roxolan/canvas-lms,Rvor/canvas-lms,snehakachroo1/LSI_replica,fronteerio/canvas-lms,djbender/canvas-lms,SwinburneOnline/canvas-lms,tgroshon/canvas-lms,jay3126/canvas-lms,venturehive/canvas-lms,sfu/canvas-lms,ShreniiNepal/shrenii_lmp