Version:           4.5.3 (using KDE 4.6.0) 
OS:                Linux

if account name have more than 23 letters in its name user can't choose right item in dropdown list on ledgers form. 

Reproducible: Always

Steps to Reproduce:
1. make several accounts with more than 23 letter in there names
2. go to Ledgers form
3. try to change current account

Actual Results:  
user can't see full account name in the list and can't choose the right one

Expected Results:  
Make possible to change (increase/decrease) width of dropdown list of accounts on the Ledgers form by the mouse or by editing the kmm configuration file