KSPe.InstallChecker is not being able to show its Modals

[Lisias]

The KSPe.InstallChecker is not being able to communicate to the user the need to restart the system because 000_KSPe is freaking out when it can't handle the new auxiliary DLLs in the PluginData.

The solution is to instrument KSPe to do not emit Modal Windows when:

• KSPe.InstallChecker is present
• There're more than one copy of KSPe Assembly on memory.

As this is a situation where InstallChecker will need the Modal to talk to the user.

[Lisias]

This fix is mandatory for CurseForge users, otherwise future KSPe updates will be troublesome for them.

Everybody else should not be affected.

[Lisias]

Fixed on commit 991e2e4 .

[Lisias]

The code for this issue was rolled back, this code will not reach the mainstream.

Issue #50 solves the problem in a better way.