check more than one condition exist before processed

[hsiaoyi0504]

For example, this kind of manifest for LFQ should not be allowed

wSQC_01222022_LCB40_B17_1727_73323-92988_chB_rs_SN1p0_centroid.mzml exp 1   DDA
wSQC_01222022_LCB40_B17_1727_73323-92988_chB_rs_SN2p0_centroid.mzml exp 2   DDA
wSQC_01222022_LCB40_B17_1728_92997-114698_chB_rs_SN1p0_centroid.mzml    exp 3   DDA
wSQC_01222022_LCB40_B17_1728_92997-114698_chB_rs_SN2p0_centroid.mzml    exp 4   DDA

[hsiaoyi0504]

For some case, user might only care about the reproducibility of their pipeline. In that case, it doesn't require to have more than one condition and that's our current limitation. Probably we should only show plots that are not based on differential expression analysis like PCA.