[3.0.0] Add possibility to bulk edit (like changing accounts, categories, tags, evaluated, etc)

At the end of each year I import thousands of bank transactions, and then classify them for tax purposes: service income, bank fees, commissions, business expenses, etc. The way Budget Flow is designed, I would have to right-click and select “Edit” for each transaction, one-by-one, to categorize them. It would result in the process taking days instead of hours.

So, the feature request: upgrade the multi-selection tool for better bulk editing:

• Allow multi-selection to remain always enabled (so it doesn't have to be activated each time in the (…) menu).

• Enable changing any attribute of multiple selected transaction. In my case, I will need to set the category, notes, and pending status.

• Add multi-selection to the search results screen.

• Add a “Select all” function, to select all visible transactions (I will need to search by name or amount, then apply a category to all).