qlog GUI crashes while history is being loaded

[Rodolfo Carvalho]

To reproduce:

1. Take a very large branch, like bzr branch lp:perl5
2. cd perl5
3. bzr qlog
4. Type anything in the search box before the history has been loaded.
5. Error, see full traceback:

bzr: ERROR: exceptions.AttributeError: 'LogModel' object has no attribute 'prop_search_filter'

Traceback (most recent call last):
  File "C:/Program Files/Bazaar/plugins\qbzr\lib\uifactory.py", line 32, in decorate
  File "C:/Program Files/Bazaar/plugins\qbzr\lib\log.py", line 487, in update_search
  File "C:/Program Files/Bazaar/plugins\qbzr\lib\logwidget.py", line 380, in set_search
AttributeError: 'LogModel' object has no attribute 'prop_search_filter'

bzr 2.5b4 on python 2.6.6 (win32)
arguments: ['c:\\Program Files\\Bazaar\\bzr.exe', 'qlog']
encoding: 'cp1252', fsenc: 'mbcs', lang: None
plugins:
  bzrtools C:\Program Files\Bazaar\plugins\bzrtools [2.4.1]
  changelog_merge C:\Program Files\Bazaar\plugins\changelog_merge [2.5b4]
  colo C:\Program Files\Bazaar\plugins\colo [0.3.1dev]
  explorer C:\Program Files\Bazaar\plugins\explorer [1.2.1]
  fastimport C:\Program Files\Bazaar\plugins\fastimport [0.12.0dev]
  git C:\Program Files\Bazaar\plugins\git [0.6.6dev]
  launchpad C:\Program Files\Bazaar\plugins\launchpad [2.5b4]
  loom C:\Program Files\Bazaar\plugins\loom [2.2.1dev]
  netrc_credential_store C:\Program Files\Bazaar\plugins\netrc_credential_store [2.5b4]
  news_merge C:\Program Files\Bazaar\plugins\news_merge [2.5b4]
  pipeline C:\Program Files\Bazaar\plugins\pipeline [1.1.0]
  qbzr C:\Program Files\Bazaar\plugins\qbzr [0.22.0dev]
  rewrite C:\Program Files\Bazaar\plugins\rewrite [0.6.3dev]
  svn C:\Program Files\Bazaar\plugins\svn [1.1.1]
  upload C:\Program Files\Bazaar\plugins\upload [1.0.1dev]
  x_bit C:\Program Files\Bazaar\plugins\x_bit [1.0.0]
  xmloutput C:\Program Files\Bazaar\plugins\xmloutput [0.8.8]

Running Bazaar on Windows 7, bzr and qbzr versions as above.

[Alexander Belchenko (bialix)]

That should be quite easy to fix. As a very minimum we can just disable search until we finish loading the history into qlog.