Add fixes for tooltip and x-axis labels

[priyesh777]

Addresses:

• issue: https://github.com/collective-service/ifrc-gates-dashboard/issues/474#issue-1508958836
• issue: https://github.com/collective-service/ifrc-gates-dashboard/issues/475#issue-1510796683

Changes:

• Add fixes for x-axis labels of dis-aggregation charts
• Add fixes for tooltips of over-view bar chart

This PR doesn't introduce any:

• [x] temporary files, auto-generated files or secret keys
• [x] build works
• [x] eslint issues
• [x] typescript issues
• [x] codegen errors
• [x] console.log meant for debugging
• [x] typos
• [x] unwanted comments
• [x] conflict markers