Submission form is cutoff / overlaps with side menu (in pre-7.6.1 only)

[tdonohue]

Describe the bug
On latest main and dspace-7_x, the Submission form is cuttoff / overlaps with the sidebar menu. It appears to be a side effect of #2454 , as reverting those changes fixes the problem (when I try that locally)

See this screenshot

To Reproduce
Steps to reproduce the behavior:

1. Can be reproduced on https://demo.dspace.org and https://sandbox.dspace.org (or locally via the latest code.
2. Login and go to the Submission Form

Related work
Caused by #2454

[tdonohue]

Solving this issue may require reverting #2454, unless a better fix can be found. Pinging you @floriangantner just in case you have time to help investigate.

[tdonohue]

Errors that appear in browser's DevTools Console on (seemingly) every page click after you login (when running in production mode: yarn build:prod; yarn serve:ssr):

ERROR Error: NG03402
    at Le (main.dcd17e51f7449cc8.js:1:1377219)
    at Io.reportError (main.dcd17e51f7449cc8.js:1:1377253)
    at Io._flushAnimations (main.dcd17e51f7449cc8.js:1:1379925)
    at Io.flush (main.dcd17e51f7449cc8.js:1:1376684)
    at ge.flush (main.dcd17e51f7449cc8.js:1:1388266)
    at main.dcd17e51f7449cc8.js:1:1396292
    at Z.invoke (polyfills.2583206b8351234c.js:1:17141)
    at Kt.run (polyfills.2583206b8351234c.js:1:12406)
    at Va.runOutsideAngular (main.dcd17e51f7449cc8.js:1:2126778)
    at ge.end (main.dcd17e51f7449cc8.js:1:1396231)

I think we need to revert #2454... it seems to have some unexpected side effects over the entire site. (These errors do NOT occur on every page click when #2454 is reverted)

[tdonohue]

Fixed by reverting #2454