fix: Remove horizontal scroll from match vouchers tab

[marination]

Solves https://github.com/alyf-de/banking/issues/48

• Adjusted horizontal space between transactions list and actions area
• Reduced scrollbar idth of transactions area
• Adjusted column widths of datatable
• Document Type field moved to end of datatable. Its not an important column and often has repetitive information

Before:

• The important columns are not all visible
• LHS is has some whitespace since its taking up way more space than it needs
• Horizontal scroll

After:

• Match reasons are highlighted in bold. One less action for users
• No horizontal scroll
• Reference, Party and Voucher are left aligned

[barredterra]

I pushed the cleanup a bit further:

• Format remaining amount only for display, not storage (#79)
• Format docname as link, remove doctype column
• Format party as link
• Now we have more space and I didn't want to fine tune the widths again, so I changed the layout to "fluid"
• Removed the index column for even more space

Remaining issues (can be solved in a separate PR):

• [x] Reference, Party and Voucher should be left aligned
• [x] Format individual cells as bold or with background to show which values matched, remove "Reason" column

Feel free to merge

[marination]

Updated description