Partial revert of 4c25e01fd7fa6b0f5539d33ee21b0e555abc5366

I was a bit careless with the sed scripts I used to cleanup the language
files, and removed some strings which I shouldn't have due to not doing
the match on whole words
Subprojects prevents load of manage_proj_edit_page.php

This is caused by type mismatch when calling check_checked which
compares a string to an integer. Solved by casting parameters to string.

Fixes #16473
Define new ERROR_TYPE_MISMATCH

This is to replace the use of ERROR_GENERIC when performing a strict
type comparison in helper_check_variables_equal() function.

Fixes #16474
Use constant DISPLAY_ERROR_HALT in admin check message

Follow up on commit 01f234514dea26cb01222249ad34265c9f8dc24

Fixes #16062
Updated default CSS to fix even/odd rows colors
Fix alternate row colors in view.php

Added new div and CSS to the View Issue Details table
Fix background color of spacer rows in view.php
Add param to specify CSS class to collapse_open()

Allows proper rendering of collapsed sections containing alternate rows
such as Issue History.

Issue #16472
Fix HTML/CSS for Issue History list
Fix HTML/CSS for Manage User Page
Fix HTML/CSS for Manage Tags Page
Fix HTML/CSS for Manage Custom Fields Pages
Fix HTML/CSS for Manage Plugins Page
Fix HTML/CSS for Manage Projects Page
Fix HTML/CSS for Manage Projects Edit Page
Fix HTML/CSS for View All Bug Page
Fix HTML/CSS for Bugnote Add
Fix HTML/CSS for Bug Update Page
Fix HTML/CSS for Manage Overview Page
Fix HTML/CSS for Manage Global Profiles page