Bug 29419: Retain user's inputs when suggesting for purchase and match found

Bug 29419: Retain user's inputs when suggesting for purchase and match found

If a user suggests for purchase and a match is found, their inputs was
not retained: quantity, item type, library, reason.

Test plan:
1. Suggest for purchase
2. Fill the title in with a string that will match an existing record
3. Fill value in quantity, item type, library and reason input/dropdown
4. Submit
=> Notice that with this patch the values you entered are retained on
the confirmation screen

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>