Version:           4.7 (using KDE 4.7.3) 
OS:                Linux

typing in the first letters doesn't select the best match requiring an extra key press (arrow down) in order to make the selection

Reproducible: Always

Steps to Reproduce:
Create a folder structure like below:
   t_admin
   t_bugs
   t_cas
   t_library
   t_msp
   \_ t_ecampus
   \_ t_olds
   t_research
   \_ t_elab
   \_ t_sn
   t_zimbra


Note: 'j' or 'm' behave identical so for the purpose of this example I'll refer 
to 'j'.

Scenario 1
==========

1. Press 'j'

2. Type 'inb'

3. Press Enter to jump to 'Inbox' folder

4. Press 'j'

5. Type 't_'

6. Confirm that 't_admin' is selected and press Enter to jump to it

7. Press 'j'

8. Type 't_'

Which folder is selected? In my case it's 't_ecampus' and every time.


Scenario 2
==========

1. Press 'j'

2. Type 'inb'

3. Press Enter to jump to 'Inbox' folder

4. Press 'j'

5. Type 't_'

6. Confirm the selected folder (in my case 't_ecampus')

7. Press Alt-C to cancel

8. Press 'j'

9. Type 't_'

Which folder is now selected? In my case it's 't_olds'. Keep repeating steps 8 
and 9 and notice how the subsequent folder is selected every time.


Scenario 3
==========

1. Press 'j'

2. Type 'inb'

3. Press Enter to jump to 'Inbox' folder

4. Press 'j'

5. Type 't_r'

6. Confirm that 't_research' is selected and press Enter

7. Press 'j'

8. Type 't_a'

9. Confirm that only 't_admin' is shown and it is not selected




Actual Results:  
Scenario 1: folder 't_ecampus' is selected every time

Scenario 2: subsequent folder is selected

Scenario 3: folder 't_admin' must be selected as it's the only match


Expected Results:  
Scenario 1: no folder should be selected as there are several matches

Scenario 2: same as Scenario 1

Scenario 3: 't_admin' must be selected (save user from an extra down arrow 
            which not as close to fingers as letters are).



There are other oddities and if this bug is confirmed I will update as I hit 
them.

Scenarion 3 is the most annoying as it requires the extra down arrow.

It would be nice if the selection dialog will be case sensitive as it will save 
an extra down arrow when selecting between IMAP "Inbox" and POP "inbox".