Add arrow to investment description

hypha/public/partner/tables.py

...lic/partner/templates/partner/base_investments_table.html

hypha/public/partner/templates/partner/table.html

...static_src/src/javascript/public/all-investments-table.js

...a/static_src/src/javascript/public/investment-tooltips.js

...rc/src/sass/public/components/_all-investments-table.scss

...atic_src/src/sass/public/components/_investment-meta.scss

hypha/static_src/src/sass/public/main.scss