Choose a tab in textmate 2

Choosing :

I use a European keyboard (french) and I can't use ⌘1, ⌘2 etc. to access a specific tab with TM2.

These shorcuts are used by the Finder to choose a Desktop (Space).
In the Preferences System, I use the default keys : ^& , ^é to go to a Desktop (Mission Control). These shortcuts works perfectly but ⌘1, ⌘2 works also perfectly in the Finder to go to the Desktop 1 etc. In TM2 go to tab use ⌘1, ⌘2 but these shortcuts don't work for me in TM2. So I have two possibilities to switch between Desktops in the Finder and none in TM2 to switch between Tabs !!

My question is how to modify the shortcuts in TM2 or in Finder ? I would like to be able to use ⌘1, ⌘2 (or a different shortcut) in Textmate to choice a tab (file) .

or How to remove the shortcuts ⌘1, ⌘2 used by the Finder to go to Desktop?

Switching :

A) Remarks about switching tabs in TM2
I can switch between tabs with ⌘} and ⌘{ but I can also make a switch with ⌘⌥-> and ⌘⌥<-.
I think it's strange to have two different shortcuts to make the same action

B) Remarks about switching Desktops (spaces) in the Finder
I can use ^-> and ^<-