fix: amendments pages styling updates

[pdp2121]

High Level Overview of Change

Address #875

• Align dropdown items in the NavBar to the left.
• Increase font weight for the right labels of the Amendment Summary page.
• Fix vnull issue on Amendment Summary rippled version.
• Add an ETA to indicate the time amendment would be enabled for ones that has more than 80% votes.
• Highlight color for amendments more than 80% on Amendments List page
• Reduce the font size for Yays Nays to match the top of the page.
• The y-axis of the graph should show percentage instead of count.
• Make Enabled column all caps.
• Rename Voters column to UNL Voters.
• Rename Enabled (on) to Enabled on.
• rippled version linked to rippled release for that version.
• The details link should open a new tab.
• Yays and Nays validators should link to the validator page on the Explorer.
• Capitalize the labels on Validator's Voting page.
• Fix loader timing issue on Amendments List page.
• tx column renamed to Enable tx
• sort to have amendments with eta on top of the amendments list

Context of Change

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactor (non-breaking change that only restructures code)
• Tests (You added tests for code that already exists, or your new feature included in this PR)
• Documentation Updates
• Translation Updates
• Release

Before / After

Amendments List Page

Amendment Summary Page

Simple

Graph

Yeas/Nays

Validator's Voting Tab