Prevent page overflow by switching to mobile header at 1000px #3484
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Summary
This PR adjusts media breakpoints so that the mobile version of the header appears at 1000px instead of 825px which fixes the horizontal page overflow caused by the desktop version's header contents not fitting at that original 825px breakpoint. The overflow was causing the page content to be offset left, shrinking the header desktop buttons and adding excess whitespace to the right side of the footer.
Closes #3483
Testing
You can test the fix out on a live demo zaproxy.ritovision.com or on a local build.
To verify, simply go to any page (try the homepage) and adjust your desktop browser screen size anywhere between 826-1000px and notice that the pages no longer have overflow breaking the layout.
I have tested the fix on Chrome, Edge and Firefox desktop browsers and confirmed its stability.
Before and After Screenshots
Top of Homepage - BEFORE
Notice the page content is significantly offset to the left. If you look closely at the line separator under the header, it ends underneath the Download button when it should span the full page; this indicates the header is overflowing and forcing the layout to compress.
Bottom of Homepage - BEFORE
Notice the footer has excess whitespace on its right side (a visual symptom of the page being forced left due to header overflow in this breakpoint range).
Top of Homepage - AFTER
Notice the content is no longer offset left
Bottom of Homepage - AFTER
Notice the footer has no excess whitespace along its right side