Use a slider with two handles to select amounts in search (was: Improve "Search operation" experience)

Created by: ZeHiro

I have identified two problems :

• The date fields are disabled, which leads to a 🚫 pointer. Which definitly tell the user NOT to click (this is necessary to display the calendar), and it is not possible to use the keyboard to enter the date (this maybe easier to do such due to date formats)
• When searching over an exact amount, it is necessary to write the exact amount in both fields (unecessary user action).
• When searching over amount, it is necessay to add the "-" (personnally, I have way more negative operations, than positive ones